hi, (on postgres 9.6) I was just practicing to make my no. of wal files in pg_xlog directory to be the same/equal as I pass on wal_keep_segments paramater. say for example show wal_keep_segments; wal_keep_segments --- 125 so I want my wal files should not be grow in numbers ...
max_wal_senders = 2 # max number of walsender processes # (change requires restart) #wal_keep_segments = 0 # in logfile segments; 0 disables #wal_sender_timeout = 60s # in milliseconds; 0 disables 1. 2. 3. 4. 5. 6. 7. max_wal_senders:开启流复制后,向备用服务器发送wal日志的最...
max_wal_senders = 2 #流复制在没有基于文件的连续归档时,主服务器可能在备机收到WAL日志前回收这些旧的WAL,此时备机需要重新从一个新的基础备份初始化;可设置wal_keep_segments为一个足够高的值来确保旧的WAL段不会被太早重用;1个WAL日志为16MB,所以在设置wal_keep_segments时,在满足空间的前提下可以尽量设置...
1.登录到postgres中查看当前的wal_keep_segments 2.在 postgres.conf中修改 降低wal_keep_segments的值，本案例中降低到512 3.重载 postgres配置文件 5.想要立刻见效，可以手动执行checkpoint pg归档的删除方法 删除0000001D0000000000000054 之前的归档 ...
archive_command='cp %p /ARCHIVES/%f' #归档命令max_wal_senders=10wal_keep_segments=25 On pg_hba.conf: host replication postgres53.99.198.12/24trust #信任主机 host replication postgres53.99.198.11/24trust 步骤4.重新启动主服务器: /optt/10.5/bin/pg_ctl -D /DATA restart ...
通过min_wal_size和max_wal_size参数来控制哪些XLOG可以循环使用。 2. 参数wal_keep_segments 在流复制的环境中。使用流复制建好备库,如果备库由于某些原因接收日志较慢。导致备库还未接收到。就被覆盖了。导致主备无法同步。这个需要重建备库。 避免这种情况提供了该参数。每个日志文件大小16M。如果参数设置64. ...
如果有问题存档WAL段。然后，我将检查陈旧的复制插槽。最后，我将检查wal_keep_segments的设置。
'5min' checkpoint_completion_target = 0.8 archive_mode = always archive_command = 'test ! -f /home/postgres/pg_arch/%f && cp %p /home/postgres/pg_arch/%f' archive_cleanup_command = 'pg_archivecleanup /home/postgres/pg_arch %r' wal_keep_segments = 64 track_commit_timestamp ...
wal_level = hot_standby # 这个是设置主为wal的主机 max_wal_senders = 10 # 这个设置了可以最多有几个流复制连接,差不多有几个从,就设置几个 wal_keep_segments = 256 # 设置流复制保留的最多的xlog数目 wal_sender_timeout = 60s # 设置流复制主机发送数据的超时时间 max_connections = 100 # 这个...
wal_keep_segments = 256 设置流复制保留的最多的xlog数目,不要设置太小导致WAL日志还没有来得及传送到standby就被覆盖。一个WAL文件默认16M hot_standby = on # "on" allows queries during recovery 设置为备库时是否支持可读 logging_collector = on ...