在使用PostgreSQL进行数据备份和恢复时,通常会使用pg_basebackup进行全量备份,再使用WAL日志进行增量备份。而pg_archivecleanup是Postgres自带的一款工具,用来清理归档日志,确保数据库中不会出现过多的历史归档日志,从而节省存储空间。 什么是pg_archivecleanup? pg_archivecleanup是PostgreSQL自带的一个工具,用于清理归档日志。
PG_RMGR(RM_GIN_ID,"Gin", gin_redo, gin_desc, gin_identify, gin_xlog_startup, gin_xlog_cleanup, gin_mask) PG_RMGR(RM_GIST_ID,"Gist", gist_redo, gist_desc, gist_identify, gist_xlog_startup, gist_xlog_cleanup, gist_mask) PG_RMGR(RM_SEQ_ID,"Sequence", seq_redo, seq_desc, ...
archive_cleanup_command = '/usr/local/postgresql-12/bin/pg_archivecleanup -d /data/postgresql-12/data/pg_wal %r >> /data/postgresql-12/log/archive_cleanup.log 2>&1' # 最多有16个流复制连接。 max_wal_senders = 16 # 设置流服务保留的最多wal(老版本叫xlog)文件个数 wal_keep_segments = ...
Process: 908 ExecStartPre=/usr/pgsql-14/bin/postgresql-14-check-db-dir ${PGDATA} (code=exited, status=0/SUCCESS) Main PID: 919 (postmaster) CGroup: /system.slice/postgresql-14.service ├─919 /usr/pgsql-14/bin/postmaster -D /var/lib/pgsql/14/data/ ├─934 postgres: logger ├─93...
cd postgresql-10.0./configure --prefix=/opt/pg10 --with-pgport=1921gmake world gmakeinstallworld # 查看版本 /opt/pg10/bin/postgres --version 1.2 设置一个软连接 有时候为了方便工作,会自己写一些shell或者python脚本处理一些定时任务,经常会通过类似/opt/pg9.x这样的全路径调用 ...
wal_compression = on checkpoint_timeout = '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_...
调用pg_stop_backup函数,停止备份。 1、pg_start_backup pg_start_backup执行以下四个操作: a. Force into the full-page write mode; 将数据库变成强制的full-page写入模式,full-page写入是将数据块内容写入redo log文件中,即pg的WAL文件; 通常数据块内容是写入数据文件而非日志文件,日志文件记录的是事务性信息...
他们先独占获取buffer content lock,去查看引用计数是否为1,如果不是,如果调用的是ConditionalLockBufferForCleanup()释放独占锁,返回false,如果是调用LockBuffqrForCleanup()释放独占锁,仍然持有引用计数,然后设置BM_PIN_COUNT_WAITER标志位,等待其他backend唤醒它,再次尝试(又会拿独占锁)。其他backend在UnpinBuffer的时候...
The vacuum_defer_cleanup_age parameter has been removed pg_walinspect: interpretation of the end_lsn parameter pg_walinspect: pg_get_wal_fpi_info → pg_get_wal_block_infoLocalizationICU: UNICODE collation ICU: Canonization of locales ICU: custom rules for customizing the sorting algorithmSecurity...
PostgreSQL:clusterdbcreatedbcreatelangcreateuserdropdbdroplangdropuserecpginitdboid2namepg_archivecleanuppg_basebackuppg_configpg_controldatapg_ctlpg_dumppg_dumpallpg_receivexlogpg_resetxlogpg_restorepg_standbypg_test_fsyncpg_test_timingpg_upgradepgbenchpostgrespostmasterpsqlreindexdbvacuumdbvacuumlo ...