首页 日常 数据库 仓库 关于我 关于本站

PostgreSQL 11 参数模板 - 珍藏级 --- digoal

2019-01-16-21:09

PostgreSQL 11 参数模板 - 珍藏级

作者

digoal

原文地址 https://github.com/digoal/blog/blob/master/201812/20181203_01.md

日期

2018-12-03

标签

PostgreSQL , 参数 , 模板 , postgresql.conf , pg_hba.conf , postgresql.auto.conf


背景

PostgreSQL 11 postgresql.conf 参数模板

# -----------------------------  
# PostgreSQL configuration file  
# -----------------------------  
#  
# This file consists of lines of the form:  
#  
#   name = value  
#  
# (The "=" is optional.)  Whitespace may be used.  Comments are introduced with  
# "#" anywhere on a line.  The complete list of parameter names and allowed  
# values can be found in the PostgreSQL documentation.  
#  
# The commented-out settings shown in this file represent the default values.  
# Re-commenting a setting is NOT sufficient to revert it to the default value;  
# you need to reload the server.  
#  
# This file is read on server startup and when the server receives a SIGHUP  
# signal.  If you edit the file on a running system, you have to SIGHUP the  
# server for the changes to take effect, run "pg_ctl reload", or execute  
# "SELECT pg_reload_conf()".  Some parameters, which are marked below,  
# require a server shutdown and restart to take effect.  
#  
# Any parameter can also be given as a command-line option to the server, e.g.,  
# "postgres -c log_connections=on".  Some parameters can be changed at run time  
# with the "SET" SQL command.  
#  
# Memory units:  kB = kilobytes        Time units:  ms  = milliseconds  
#                MB = megabytes                     s   = seconds  
#                GB = gigabytes                     min = minutes  
#                TB = terabytes                     h   = hours  
#                                                   d   = days  


#------------------------------------------------------------------------------  
# FILE LOCATIONS  
#------------------------------------------------------------------------------  

# The default values of these variables are driven from the -D command-line  
# option or PGDATA environment variable, represented here as ConfigDir.  

#data_directory = 'ConfigDir'           # use data in another directory  
                                        # (change requires restart)  
#hba_file = 'ConfigDir/pg_hba.conf'     # host-based authentication file  
                                        # (change requires restart)  
#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file  
                                        # (change requires restart)  

# If external_pid_file is not explicitly set, no extra PID file is written.  
#external_pid_file = ''                 # write an extra PID file  
                                        # (change requires restart)  


#------------------------------------------------------------------------------  
# CONNECTIONS AND AUTHENTICATION  
#------------------------------------------------------------------------------  

# - Connection Settings -  

listen_addresses = '0.0.0.0'            # what IP address(es) to listen on;  
                                        # comma-separated list of addresses;  
                                        # defaults to 'localhost'; use '*' for all  
                                        # (change requires restart)  
# 根据业务需求设定监听  
port = 1921                             # (change requires restart)  

# 建议不要大于 200 * 四分之一物理内存(GB), 例如四分之一物理内存为16G,则建议不要超过3200.      
# (假设一个连接耗费5MB,实际上syscache很大时,可能更多)   
# [《PostgreSQL relcache在长连接应用中的内存霸占"坑"》](201607/20160709_01.md)   
max_connections = 2000                  # (change requires restart)  
superuser_reserved_connections = 13      # (change requires restart)  

# $PGDATA, /tmp中 创建unix socket监听  
unix_socket_directories = '., /tmp'        # comma-separated list of directories  
                                        # (change requires restart)  
#unix_socket_group = ''                 # (change requires restart)  

# 除了OWNER和超级用户,其他用户无法从/tmp unix socket连接该实例  
unix_socket_permissions = 0700          # begin with 0 to use octal notation     
                                        # (change requires restart)  
#bonjour = off                          # advertise server via Bonjour  
                                        # (change requires restart)  
#bonjour_name = ''                      # defaults to the computer name  
                                        # (change requires restart)  

# - TCP Keepalives -  
# see "man 7 tcp" for details  

# 如果你连接数据库空闲一段时间会端口,可能是网络中存在会话超时的设备,建议可以设置一下这个心跳时间,TCP心跳间隔会缩短到60秒。  
tcp_keepalives_idle = 60                # TCP_KEEPIDLE, in seconds;  
                                        # 0 selects the system default  
tcp_keepalives_interval = 10            # TCP_KEEPINTVL, in seconds;  
                                        # 0 selects the system default  
tcp_keepalives_count = 10               # TCP_KEEPCNT;  
                                        # 0 selects the system default  

# - Authentication -  

#authentication_timeout = 1min          # 1s-600s  

# md5 or scram-sha-256   # 如果MD5会泄露,建议使用scram-sha-256,但是相互不兼容,请注意。   
# [《PostgreSQL 10.0 preview 安全增强 - SASL认证方法 之 scram-sha-256 安全认证机制》](201703/20170309_01.md)    
#password_encryption = md5              # md5 or scram-sha-256  
#db_user_namespace = off  

# GSSAPI using Kerberos  
#krb_server_keyfile = ''  
#krb_caseins_users = off  

# - SSL -  

#ssl = off  
#ssl_ca_file = ''  
#ssl_cert_file = 'server.crt'  
#ssl_crl_file = ''  
#ssl_key_file = 'server.key'  
#ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers  
#ssl_prefer_server_ciphers = on  
#ssl_ecdh_curve = 'prime256v1'  
#ssl_dh_params_file = ''  
#ssl_passphrase_command = ''  
#ssl_passphrase_command_supports_reload = off  


#------------------------------------------------------------------------------  
# RESOURCE USAGE (except WAL)  
#------------------------------------------------------------------------------  

# - Memory -  

# 1/4 主机内存   
shared_buffers = 24GB                  # min 128kB  
                                        # (change requires restart)  
# 当不使用huge page,并且连接数大于3000时,建议shared buffer不要超过48G  
# 建议shared buffer设置超过32GB时 使用大页,页大小 /proc/meminfo Hugepagesize    
huge_pages = try                # on, off, or try  
                                        # (change requires restart)  
#temp_buffers = 8MB                     # min 800kB  

# 如果用户需要使用两阶段提交,需要设置为大于0,建议与max_connections一样大  
max_prepared_transactions = 2000                # zero disables the feature  
                                        # (change requires restart)  
# Caution: it is not advisable to set max_prepared_transactions nonzero unless  
# you actively intend to use prepared transactions.  

# 可以在会话中设置,如果有大量JOIN,聚合操作,并且期望使用hash agg或hash join。   
# 可以设大一些,但是不建议大于    四分之一内存除以最大连接数  .   
# (一条QUERY中可以使用多倍WORK_MEM,与执行计划中的NODE有关)    
# 建议给一个输入,AP模式TP模式OR混合模式。三种模式使用三种不同的计算公式  
work_mem = 8MB                          # min 64kB  

# min( 2G, (1/4 主机内存)/autovacuum_max_workers )    
maintenance_work_mem = 2GB              # min 1MB  
#autovacuum_work_mem = -1               # min 1MB, or -1 to use maintenance_work_mem  
#max_stack_depth = 2MB                  # min 100kB  
dynamic_shared_memory_type = posix      # the default is the first option  
                                        # supported by the operating system:  
                                        #   posix  
                                        #   sysv  
                                        #   windows  
                                        #   mmap  
                                        # use none to disable dynamic shared memory  
                                        # (change requires restart)  

# - Disk -  

# 如果需要限制临时文件使用量,可以设置。  
# 例如防止有异常的递归调用,无限使用临时文件。  
#temp_file_limit = -1                   # limits per-process temp file space  
                                        # in kB, or -1 for no limit  

# - Kernel Resources -  

## 如果你的数据库有非常多小文件(比如有几十万以上的表,还有索引等,并且每张表都会被访问到时),  
# 建议FD可以设多一些,避免进程需要打开关闭文件。  
## 但是不要大于前面章节系统设置的ulimit -n(open files)  
# max_files_per_process=655360  

#max_files_per_process = 1000           # min 25  
                                        # (change requires restart)  

# - Cost-Based Vacuum Delay -  

# 如果你的IO非常好,则可以关闭vacuum delay   
vacuum_cost_delay = 0                   # 0-100 milliseconds  
#vacuum_cost_page_hit = 1               # 0-10000 credits  
#vacuum_cost_page_miss = 10             # 0-10000 credits  
#vacuum_cost_page_dirty = 20            # 0-10000 credits  

# io很好,CPU核数很多的机器,设大一些。如果设置了vacuum_cost_delay = 0 ,则这个不需要配置  
vacuum_cost_limit = 10000                # 1-10000 credits  

# - Background Writer -  

bgwriter_delay = 10ms                   # 10-10000ms between rounds  
bgwriter_lru_maxpages = 1000            # max buffers written/round, 0 disables  
bgwriter_lru_multiplier = 10.0          # 0-10.0 multiplier on buffers scanned/round  
bgwriter_flush_after = 512kB            # measured in pages, 0 disables  

# - Asynchronous Behavior -  

effective_io_concurrency = 0            # 1-1000; 0 disables prefetching  

# wal sender, user 动态fork的process, parallel worker等都算作 worker process, 所以你需要设置足够大.   
max_worker_processes = 128              # (change requires restart)  

#  如果需要使用并行创建索引,设置为大于1 ,不建议超过 主机cores-2  
max_parallel_maintenance_workers = 6    # taken from max_parallel_workers  

#  如果需要使用并行查询,设置为大于1 ,不建议超过 主机cores-2  
max_parallel_workers_per_gather = 0     # taken from max_parallel_workers  
parallel_leader_participation = on  

#  如果需要使用并行查询,设置为大于1 ,不建议超过 主机cores-2  
#  必须小于 max_worker_processes   
max_parallel_workers = 32               # maximum number of max_worker_processes that  
                                        # can be used in parallel operations  
#old_snapshot_threshold = -1            # 1min-60d; -1 disables; 0 is immediate  
                                        # (change requires restart)  
#backend_flush_after = 256               # measured in pages, 0 disables  


#------------------------------------------------------------------------------  
# WRITE-AHEAD LOG  
#------------------------------------------------------------------------------  

# - Settings -  

# 需要流复制物理备库、归档、时间点恢复时,设置为replica,需要逻辑订阅或逻辑备库则设置为logical  
wal_level = replica  # minimal, replica, or logical  
                                        # (change requires restart)  
#fsync = on                             # flush data to disk for crash safety  
                                        # (turning this off can cause  
                                        # unrecoverable data corruption)  

# 如果双节点,设置为ON,如果是多副本,同步模式,建议设置为remote_write。   
# 如果磁盘性能很差,并且是OLTP业务。可以考虑设置为off降低COMMIT的RT,提高吞吐(设置为OFF时,可能丢失部分XLOG RECORD)  
synchronous_commit = off                # synchronization level;  
                                        # off, local, remote_write, remote_apply, or on  

# 建议使用pg_test_fsync测试后,决定用哪个最快。通常LINUX下open_datasync比较快。  
#wal_sync_method = fsync                # the default is the first option  
                                        # supported by the operating system:  
                                        #   open_datasync  
                                        #   fdatasync (default on Linux)  
                                        #   fsync  
                                        #   fsync_writethrough  
                                        #   open_sync  

# 如果文件系统支持COW例如ZFS,则建议设置为OFF。 如果文件系统可以保证datafile block size的原子写,在对齐后也可以设置为OFF。  
# 如果底层存储能保证IO的原子写,也可以设置为OFF。  
full_page_writes = on                  # recover from partial page writes  

# 当写FULL PAGE的io是瓶颈时建议开启  
wal_compression = on                  # enable compression of full-page writes  
#wal_log_hints = off                    # also do full page writes of non-critical updates  
                                        # (change requires restart)  
# 建议 min( 512MB, shared_buffers/32 )   
#wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers  
                                        # (change requires restart)  

# 如果设置了synchronous_commit = off,可以设置wal_writer_delay  
wal_writer_delay = 10ms         # 1-10000 milliseconds  
wal_writer_flush_after = 1MB            # measured in pages, 0 disables  

# 如果synchronous_commit=on, 并且已知业务系统为高并发,对数据库有写操作的小事务,则可以设置commit_delay来实现分组提交,合并WAL FSYNCIO 。  
#commit_delay = 10                       # range 0-100000, in microseconds  
# 同时处于提交状态的事务数超过commit_siblings时,使用分组提交  
#commit_siblings = 5                    # range 1-1000  

# - Checkpoints -  

#  不建议频繁做检查点,否则XLOG会产生很多的FULL PAGE WRITE(when full_page_writes=on)。  
checkpoint_timeout = 30min              # range 30s-1d  

# 建议等于SHARED BUFFER,或2倍。  
# 同时需要考虑崩溃恢复时间, 越大,检查点可能拉越长导致崩溃恢复耗时越长。但是越小,开启FPW时,WAL日志写入量又越大。 建议采用COW文件系统,关闭FPW。  
max_wal_size = 48GB  
# 建议是SHARED BUFFER的2分之一  
min_wal_size = 12GB  

# 硬盘好的情况下,可以让检查点快速结束,恢复时也可以快速达到一致状态。否则建议0.5~0.9  
checkpoint_completion_target = 0.1    # checkpoint target duration, 0.0 - 1.0  

# IO很好的机器,不需要考虑平滑调度, 否则建议128~256kB  
checkpoint_flush_after = 256kB          # measured in pages, 0 disables  
#checkpoint_flush_after = 0             # measured in pages, 0 disables  
#checkpoint_warning = 30s               # 0 disables  

# - Archiving -  

# 建议默认打开,因为修改它需要重启实例  
#archive_mode = off             # enables archiving; off, on, or always  
                                # (change requires restart)  

#  后期再修改,如  'test ! -f /disk1/digoal/arch/%f && cp %p /disk1/digoal/arch/%f'  
#archive_command = ''           # command to use to archive a logfile segment  
                                # placeholders: %p = path of file to archive  
                                #               %f = file name only  
                                # e.g. 'test ! -f /mnt/server/archivedir/%f && cp %p /mnt/server/archivedir/%f'  
#archive_timeout = 0            # force a logfile segment switch after this  
                                # number of seconds; 0 disables  


#------------------------------------------------------------------------------  
# REPLICATION  
#------------------------------------------------------------------------------  

# - Sending Servers -  

# Set these on the master and on any standby that will send replication data.  

# 同时需要几个流复制连接,根据实际需求设定  
max_wal_senders = 10             # max number of walsender processes  
                                # (change requires restart)  

# 根据实际情况设置保留WAL的数量,主要是防止过早的清除WAL,导致备库因为主库的WAL清除而中断。根据实际情况设定。  
#wal_keep_segments = 0          # in logfile segments; 0 disables  
#wal_sender_timeout = 60s       # in milliseconds; 0 disables  


# 根据实际情况设置需要创建多少replication slot  
# 使用slot,可以保证流复制下游没有接收的WAL会在当前节点永久保留。所以必须留意下游的接收情况,否则可能导致WAL爆仓  
# 建议大于等于max_wal_senders  
#max_replication_slots = 10     # max number of replication slots  
                                # (change requires restart)  
#track_commit_timestamp = off   # collect timestamp of transaction commit  
                                # (change requires restart)  

# - Master Server -  

# These settings are ignored on a standby server.  


# 如果有2个或2个以上的备库,可以考虑使用同步多副本模式。 根据实际情况设置  
[《PostgreSQL 一主多从(多副本,强同步)简明手册 - 配置、压测、监控、切换、防脑裂、修复、0丢失 - 珍藏级》](201803/20180326_01.md)    
#synchronous_standby_names = '' # standby servers that provide sync rep  
                                # method to choose sync standbys, number of sync standbys,  
                                # and comma-separated list of application_name  
                                # from standby(s); '*' = all  

# 注意,容易导致膨胀,容易导致VACUUM进程空转,导致IO和CPU飙升。(特别是autovacuum naptime配置很小时)  
#vacuum_defer_cleanup_age = 0   # number of xacts by which cleanup is delayed  

# - Standby Servers -  

# These settings are ignored on a master server.  

#hot_standby = on                       # "off" disallows queries during recovery  
                                        # (change requires restart)  
#max_standby_archive_delay = 30s        # max delay before canceling queries  
                                        # when reading WAL from archive;  
                                        # -1 allows indefinite delay  
#max_standby_streaming_delay = 30s      # max delay before canceling queries  
                                        # when reading streaming WAL;  
                                        # -1 allows indefinite delay  
#wal_receiver_status_interval = 10s     # send replies at least this often  
                                        # 0 disables  

# 建议关闭,以免备库长事务导致 主库无法回收垃圾而膨胀。  
[《PostgreSQL物理"备库"的哪些操作或配置,可能影响"主库"的性能、垃圾回收、IO波动》](201704/20170410_03.md)    
#hot_standby_feedback = off             # send info from standby to prevent  
                                        # query conflicts  
#wal_receiver_timeout = 60s             # time that receiver waits for  
                                        # communication from master  
                                        # in milliseconds; 0 disables  
#wal_retrieve_retry_interval = 5s       # time to wait before retrying to  
                                        # retrieve WAL after a failed attempt  

# - Subscribers -  

# These settings are ignored on a publisher.  

# [《PostgreSQL 10.0 preview 逻辑订阅 - 原理与最佳实践》](201702/20170227_01.md)    
# These settings are ignored on a publisher.   
# 必须小于  max_worker_processes  
#max_logical_replication_workers = 4    # taken from max_worker_processes  
                                        # (change requires restart)  
#max_sync_workers_per_subscription = 2  # taken from max_logical_replication_workers  


#------------------------------------------------------------------------------  
# QUERY TUNING  
#------------------------------------------------------------------------------  

# - Planner Method Configuration -  

#enable_bitmapscan = on  
#enable_hashagg = on  
#enable_hashjoin = on  
#enable_indexscan = on  
#enable_indexonlyscan = on  
#enable_material = on  
#enable_mergejoin = on  
#enable_nestloop = on  
#enable_parallel_append = on  
#enable_seqscan = on  
#enable_sort = on  
#enable_tidscan = on  
#enable_partitionwise_join = off  
#enable_partitionwise_aggregate = off  
#enable_parallel_hash = on  
#enable_partition_pruning = on  

# - Planner Cost Constants -  

#seq_page_cost = 1.0                    # measured on an arbitrary scale  
# 离散IO很好的机器(例如ssd, nvme ssd),不需要考虑离散和顺序扫描的成本差异   
random_page_cost = 1.1                 # same scale as above  
#cpu_tuple_cost = 0.01                  # same scale as above  
#cpu_index_tuple_cost = 0.005           # same scale as above  
#cpu_operator_cost = 0.0025             # same scale as above  
#parallel_tuple_cost = 0.1              # same scale as above  
#parallel_setup_cost = 1000.0   # same scale as above  

#jit_above_cost = 100000                # perform JIT compilation if available  
                                        # and query more expensive, -1 disables  
#jit_optimize_above_cost = 500000       # optimize JITed functions if query is  
                                        # more expensive, -1 disables  
#jit_inline_above_cost = 500000         # attempt to inline operators and  
                                        # functions if query is more expensive,  
                                        # -1 disables  

#min_parallel_table_scan_size = 8MB  
#min_parallel_index_scan_size = 512kB  

# 扣掉会话连接RSS,shared buffer, autovacuum worker, 剩下的都是OS可用的CACHE。  
effective_cache_size = 80GB  

# - Genetic Query Optimizer -  

#geqo = on  
#geqo_threshold = 12  
#geqo_effort = 5                        # range 1-10  
#geqo_pool_size = 0                     # selects default based on effort  
#geqo_generations = 0                   # selects default based on effort  
#geqo_selection_bias = 2.0              # range 1.5-2.0  
#geqo_seed = 0.0                        # range 0.0-1.0  

# - Other Planner Options -  

#default_statistics_target = 100        # range 1-10000  
#constraint_exclusion = partition       # on, off, or partition  
#cursor_tuple_fraction = 0.1            # range 0.0-1.0  
#from_collapse_limit = 8  
#join_collapse_limit = 8                # 1 disables collapsing of explicit  
                                        # JOIN clauses  
#force_parallel_mode = off  


#------------------------------------------------------------------------------  
# REPORTING AND LOGGING  
#------------------------------------------------------------------------------  

# - Where to Log -  

log_destination = 'csvlog'              # Valid values are combinations of  
                                        # stderr, csvlog, syslog, and eventlog,  
                                        # depending on platform.  csvlog  
                                        # requires logging_collector to be on.  

# This is used when logging to stderr:  
logging_collector = on                  # Enable capturing of stderr and csvlog  
                                        # into log files. Required to be on for  
                                        # csvlogs.  
                                        # (change requires restart)  

# These are only used if logging_collector is on:  
log_directory = 'log'                   # directory where log files are written,  
                                        # can be absolute or relative to PGDATA  
log_filename = 'postgresql-%a.log'      # log file name pattern,  
                                        # can include strftime() escapes  
#log_file_mode = 0600                   # creation mode for log files,  
                                        # begin with 0 to use octal notation  
log_truncate_on_rotation = on           # If on, an existing log file with the  
                                        # same name as the new log file will be  
                                        # truncated rather than appended to.  
                                        # But such truncation only occurs on  
                                        # time-driven rotation, not on restarts  
                                        # or size-driven rotation.  Default is  
                                        # off, meaning append to existing files  
                                        # in all cases.  
log_rotation_age = 1d                   # Automatic rotation of logfiles will  
                                        # happen after that time.  0 disables.  
log_rotation_size = 0                   # Automatic rotation of logfiles will  
                                        # happen after that much log output.  
                                        # 0 disables.  

# These are relevant when logging to syslog:  
#syslog_facility = 'LOCAL0'  
#syslog_ident = 'postgres'  
#syslog_sequence_numbers = on  
#syslog_split_messages = on  

# This is only relevant when logging to eventlog (win32):  
# (change requires restart)  
#event_source = 'PostgreSQL'  

# - When to Log -  

#client_min_messages = notice           # values in order of decreasing detail:  
                                        #   debug5  
                                        #   debug4  
                                        #   debug3  
                                        #   debug2  
                                        #   debug1  
                                        #   log  
                                        #   notice  
                                        #   warning  
                                        #   error  

#log_min_messages = warning             # values in order of decreasing detail:  
                                        #   debug5  
                                        #   debug4  
                                        #   debug3  
                                        #   debug2  
                                        #   debug1  
                                        #   info  
                                        #   notice  
                                        #   warning  
                                        #   error  
                                        #   log  
                                        #   fatal  
                                        #   panic  

#log_min_error_statement = error        # values in order of decreasing detail:  
                                        #   debug5  
                                        #   debug4  
                                        #   debug3  
                                        #   debug2  
                                        #   debug1  
                                        #   info  
                                        #   notice  
                                        #   warning  
                                        #   error  
                                        #   log  
                                        #   fatal  
                                        #   panic (effectively off)  

# 根据实际情况设定,例如业务上认为5秒以上是慢SQL,那么就设置为5秒。  
log_min_duration_statement = 5s        # -1 is disabled, 0 logs all statements  
                                        # and their durations, > 0 logs only  
                                        # statements running at least this number  
                                        # of milliseconds  


# - What to Log -  

#debug_print_parse = off  
#debug_print_rewritten = off  
#debug_print_plan = off  
#debug_pretty_print = on  
log_checkpoints = on   

# 如果业务是短连接,建议设置为OFF,否则建议设置为ON  
log_connections = on  

# 如果业务是短连接,建议设置为OFF,否则建议设置为ON  
log_disconnections = on  
#log_duration = off  
log_error_verbosity = verbose    # terse, default, or verbose messages  
#log_hostname = off  
log_line_prefix = '%m [%p] '            # special values:  
                                        #   %a = application name  
                                        #   %u = user name  
                                        #   %d = database name  
                                        #   %r = remote host and port  
                                        #   %h = remote host  
                                        #   %p = process ID  
                                        #   %t = timestamp without milliseconds  
                                        #   %m = timestamp with milliseconds  
                                        #   %n = timestamp with milliseconds (as a Unix epoch)  
                                        #   %i = command tag  
                                        #   %e = SQL state  
                                        #   %c = session ID  
                                        #   %l = session line number  
                                        #   %s = session start timestamp  
                                        #   %v = virtual transaction ID  
                                        #   %x = transaction ID (0 if none)  
                                        #   %q = stop here in non-session  
                                        #        processes  
                                        #   %% = '%'  
                                        # e.g. '<%u%%%d> '  
#log_lock_waits = off                   # log lock waits >= deadlock_timeout  

# 如果需要审计SQL,则可以设置为all  
#log_statement = 'none'                 # none, ddl, mod, all  
#log_replication_commands = off  
#log_temp_files = -1                    # log temporary files equal or larger  
                                        # than the specified size in kilobytes;  
                                        # -1 disables, 0 logs all temp files  
log_timezone = 'PRC'    

#------------------------------------------------------------------------------  
# PROCESS TITLE  
#------------------------------------------------------------------------------  

#cluster_name = ''                      # added to process titles if nonempty  
                                        # (change requires restart)  
#update_process_title = on  


#------------------------------------------------------------------------------  
# STATISTICS  
#------------------------------------------------------------------------------  

# - Query and Index Statistics Collector -  

#track_activities = on  
#track_counts = on  

# 跟踪IO耗时会带来一定的性能影响,默认是关闭的  
# 如果需要统计IO的时间开销,设置为ON  
# 建议用pg_test_timing测试一下获取时间的开销,如果开销很大,建议关闭这个时间跟踪。  
#track_io_timing = off  
#track_functions = none                 # none, pl, all  
#track_activity_query_size = 1024       # (change requires restart)  
#stats_temp_directory = 'pg_stat_tmp'  


# - Monitoring -  

#log_parser_stats = off  
#log_planner_stats = off  
#log_executor_stats = off  
#log_statement_stats = off  


#------------------------------------------------------------------------------  
# AUTOVACUUM  
#------------------------------------------------------------------------------  

#autovacuum = on                        # Enable autovacuum subprocess?  'on'  
                                        # requires track_counts to also be on.  
log_autovacuum_min_duration = 0 # -1 disables, 0 logs all actions and  
                                        # their durations, > 0 logs only  
                                        # actions running at least this number  
                                        # of milliseconds.  

# CPU核多,并且IO好的情况下,可多点,但是注意最多可能消耗这么多内存:   
# autovacuum_max_workers * autovacuum mem(autovacuum_work_mem),  
# 会消耗较多内存,所以内存也要有基础。       
# 当DELETE\UPDATE非常频繁时,建议设置多一点,防止膨胀严重      
autovacuum_max_workers = 8              # max number of autovacuum subprocesses  
                                        # (change requires restart)  

# 建议不要太高频率,否则会因为vacuum产生较多的XLOG。或者在某些垃圾回收不掉的情况下(例如长事务、feed back on,等),导致一直触发vacuum,CPU和IO都会升高  
[《PostgreSQL垃圾回收代码分析 - why postgresql cann't reclaim tuple is HEAPTUPLE_RECENTLY_DEAD》](201505/20150503_01.md)    
[《PostgreSQL物理"备库"的哪些操作或配置,可能影响"主库"的性能、垃圾回收、IO波动》](201704/20170410_03.md)    
#autovacuum_naptime = 1min              # time between autovacuum runs  
#autovacuum_vacuum_threshold = 50       # min number of row updates before  
                                        # vacuum  
#autovacuum_analyze_threshold = 50      # min number of row updates before  
                                        # analyze  
#autovacuum_vacuum_scale_factor = 0.2   # fraction of table size before vacuum  
#autovacuum_analyze_scale_factor = 0.1  # fraction of table size before analyze  

# 除了设置较大的FREEZE值。  
# 还是需要注意FREEZE风暴  [《PostgreSQL Freeze 风暴预测续 - 珍藏级SQL》](201804/20180411_01.md)    
# 表级定制freeze  
autovacuum_freeze_max_age = 1200000000  # maximum XID age before forced vacuum  
                                        # (change requires restart)  
autovacuum_multixact_freeze_max_age = 1400000000        # maximum multixact age  
                                        # before forced vacuum  
                                        # (change requires restart)  

# 如果数据库UPDATE非常频繁,建议设置为0。并且建议使用SSD  
autovacuum_vacuum_cost_delay = 0ms      # default vacuum cost delay for  
                                        # autovacuum, in milliseconds;  
                                        # -1 means use vacuum_cost_delay  
#autovacuum_vacuum_cost_limit = -1      # default vacuum cost limit for  
                                        # autovacuum, -1 means use  
                                        # vacuum_cost_limit  


#------------------------------------------------------------------------------  
# CLIENT CONNECTION DEFAULTS  
#------------------------------------------------------------------------------  

# - Statement Behavior -  

#search_path = '"$user", public'        # schema names  
#row_security = on  
#default_tablespace = ''                # a tablespace name, '' uses the default  
#temp_tablespaces = ''                  # a list of tablespace names, '' uses  
                                        # only default tablespace  
#check_function_bodies = on  
#default_transaction_isolation = 'read committed'  
#default_transaction_read_only = off  
#default_transaction_deferrable = off  
#session_replication_role = 'origin'  

# 可以用来防止风暴,但是不建议全局设置  
#statement_timeout = 0                  # in milliseconds, 0 is disabled  

# 执行DDL时,建议加上超时  
#lock_timeout = 0                       # in milliseconds, 0 is disabled  

# 空闲中事务自动清理,根据业务实际情况设置  
#idle_in_transaction_session_timeout = 0        # in milliseconds, 0 is disabled  

#vacuum_freeze_min_age = 50000000  
vacuum_freeze_table_age = 1150000000  
#vacuum_multixact_freeze_min_age = 5000000  
vacuum_multixact_freeze_table_age = 1150000000  
#vacuum_cleanup_index_scale_factor = 0.1        # fraction of total number of tuples  
                                                # before index cleanup, 0 always performs  
                                                # index cleanup  
#bytea_output = 'hex'                   # hex, escape  
#xmlbinary = 'base64'  
#xmloption = 'content'  

# 限制GIN扫描的返回结果集大小,在想限制超多匹配的返回时可以设置  
#gin_fuzzy_search_limit = 0  

# GIN索引pending list的大小  
#gin_pending_list_limit = 4MB  

# - Locale and Formatting -  

datestyle = 'iso, mdy'  
#intervalstyle = 'postgres'  
timezone = 'PRC'  
#timezone_abbreviations = 'Default'     # Select the set of available time zone  
                                        # abbreviations.  Currently, there are  
                                        #   Default  
                                        #   Australia (historical usage)  
                                        #   India  
                                        # You can create your own file in  
                                        # share/timezonesets/.  
#extra_float_digits = 0                 # min -15, max 3  
#client_encoding = sql_ascii            # actually, defaults to database  
                                        # encoding  

# These settings are initialized by initdb, but they can be changed.  
lc_messages = 'C'                       # locale for system error message  
                                        # strings  
lc_monetary = 'C'                       # locale for monetary formatting  
lc_numeric = 'C'                        # locale for number formatting  
lc_time = 'C'                           # locale for time formatting  

# default configuration for text search  
default_text_search_config = 'pg_catalog.english'  

# - Shared Library Preloading -  

# 需要加载什么LIB,预先加载,对于经常访问的库也建议预加载,例如postgis  
#shared_preload_libraries = 'pg_jieba,pipelinedb'        # (change requires restart)  
#local_preload_libraries = ''  
#session_preload_libraries = ''  

# - Other Defaults -  

#dynamic_library_path = '$libdir'  

jit = off                               # allow JIT compilation  
#jit_provider = 'llvmjit'               # JIT implementation to use  

#------------------------------------------------------------------------------  
# LOCK MANAGEMENT  
#------------------------------------------------------------------------------  

#deadlock_timeout = 1s  
#max_locks_per_transaction = 64         # min 10  
                                        # (change requires restart)  
#max_pred_locks_per_transaction = 64    # min 10  
                                        # (change requires restart)  
#max_pred_locks_per_relation = -2       # negative values mean  
                                        # (max_pred_locks_per_transaction  
                                        #  / -max_pred_locks_per_relation) - 1  
#max_pred_locks_per_page = 2            # min 0  


#------------------------------------------------------------------------------  
# VERSION AND PLATFORM COMPATIBILITY  
#------------------------------------------------------------------------------  

# - Previous PostgreSQL Versions -  

#array_nulls = on  
#backslash_quote = safe_encoding        # on, off, or safe_encoding  
#default_with_oids = off  

# [《PostgreSQL 转义、UNICODE、与SQL注入》](201704/20170402_01.md)    
#escape_string_warning = on  
#lo_compat_privileges = off  
#operator_precedence_warning = off  
#quote_all_identifiers = off  
#standard_conforming_strings = on  
#synchronize_seqscans = on  

# - Other Platforms and Clients -  

#transform_null_equals = off  


#------------------------------------------------------------------------------  
# ERROR HANDLING  
#------------------------------------------------------------------------------  

#exit_on_error = off                    # terminate session on any error?  
#restart_after_crash = on               # reinitialize after backend crash?  


#------------------------------------------------------------------------------  
# CONFIG FILE INCLUDES  
#------------------------------------------------------------------------------  

# These options allow settings to be loaded from files other than the  
# default postgresql.conf.  

#include_dir = 'conf.d'                 # include files ending in '.conf' from  
                                        # directory 'conf.d'  
#include_if_exists = 'exists.conf'      # include file only if it exists  
#include = 'special.conf'               # include file  


#------------------------------------------------------------------------------  
# CUSTOMIZED OPTIONS  
#------------------------------------------------------------------------------  

# Add settings for extensions here  

64G内存,16核,SSD机器的配置例子

listen_addresses = '0.0.0.0'  
port = 1921  
max_connections = 2000  
superuser_reserved_connections = 13  
unix_socket_directories = '/tmp, .'  
unix_socket_permissions = 0700  
tcp_keepalives_idle = 60  
tcp_keepalives_interval = 10  
tcp_keepalives_count = 10  
shared_buffers = 8GB  
max_prepared_transactions = 2000  
maintenance_work_mem = 1GB  
vacuum_cost_delay = 0  
bgwriter_delay = 10ms  
bgwriter_lru_maxpages = 1000  
bgwriter_lru_multiplier = 10.0  
effective_io_concurrency = 0  
max_worker_processes = 128  
max_parallel_maintenance_workers = 8  
max_parallel_workers_per_gather = 8  
max_parallel_workers = 10  
wal_level = replica  
synchronous_commit = off  
full_page_writes = on  
wal_compression = on  
wal_buffers = 64MB  
wal_writer_delay = 10ms  
checkpoint_timeout = 30min  
max_wal_size = 16GB  
min_wal_size = 4GB  
checkpoint_completion_target = 0.1  
archive_mode = on  
archive_command = '/bin/date'  
max_wal_senders = 16  
max_standby_archive_delay = 300s  
max_standby_streaming_delay = 300s  
hot_standby_feedback = off  
max_logical_replication_workers = 10  

# 以下两个参数默认关闭, 分区表JOIN时使用并行JOIN
# [《PostgreSQL 11 preview - 分区表智能并行JOIN (已类似MPP架构,性能暴增)》](201802/20180202_02.md)  
enable_partitionwise_join = on  
enable_partitionwise_aggregate = on  

enable_parallel_hash = on  
enable_partition_pruning = on  
random_page_cost = 1.1  
effective_cache_size = 48GB  

# 如果使用LLVM编译的话,并且业务有复杂SQL的情况下。建议开启JIT。
# jit = on  
log_destination = 'csvlog'  
logging_collector = on  
log_directory = 'log'  
log_filename = 'postgresql-%a.log'  
log_truncate_on_rotation = on  
log_rotation_age = 1d  
log_rotation_size = 0  
log_min_duration_statement = 5s  
log_checkpoints = on  
log_connections = on  
log_disconnections = on  
log_error_verbosity = verbose     
log_line_prefix = '%m [%p] '  
log_lock_waits = on  
log_statement = 'ddl'  
track_activity_query_size = 2048  
autovacuum = on  
log_autovacuum_min_duration = 0  
autovacuum_max_workers = 8  
autovacuum_freeze_max_age = 1200000000  
autovacuum_multixact_freeze_max_age = 1400000000  
autovacuum_vacuum_cost_delay = 0ms  
# statement_timeout = 45min  
lock_timeout = 15s                                
idle_in_transaction_session_timeout = 60s  
vacuum_freeze_table_age = 1150000000  
vacuum_multixact_freeze_table_age = 1150000000  
# shared_preload_libraries = 'pg_stat_statements'  
deadlock_timeout = 1s  

pg_hba.conf 数据库防火墙配置模板

# TYPE  DATABASE        USER            ADDRESS                 METHOD  

# "local" is for Unix domain socket connections only  
local   all             all                                     trust  
# IPv4 local connections:  
host    all             all             127.0.0.1/32            trust  
# IPv6 local connections:  
host    all             all             ::1/128                 trust  
# Allow replication connections from localhost, by a user with the  
# replication privilege.  
local   replication     all                                     trust  
host    replication     all             127.0.0.1/32            trust  
host    replication     all             ::1/128                 trust  

# 禁止超级用户从远程连接  
host all postgres 0.0.0.0/0 reject  

# 应用连接配置:哪个用户,从哪里来,连接什么数据库。规则为使用何种认证方法,或拒绝?  
# TYPE  DATABASE        USER            ADDRESS                 METHOD  

# 如果不想挨个配置,可以使用如下配置,允许所有来源,通过任意用户访问任意数据库  
host all all 0.0.0.0/0 md5  

Flag Counter

digoal's 大量PostgreSQL文章入口

免费领取阿里云RDS PostgreSQL实例、ECS虚拟机

更多文章


回归linux!

愿意透露姓名的网友:admin

这叫修正

愿意透露姓名的网友:admin

调教???

愿意透露姓名的网友:mandian

Nice Style, I love it

愿意透露姓名的网友:seamonster

偷偷更新了一下

愿意透露姓名的网友:admin

友情链接