max_wal_size是PostgreSQL数据库中用于配置WAL(Write-Ahead Logging)的参数之一,用于控制WAL文件的最大大小。WAL是一种日志记录机制,用于持久化数据的变化操作,保证数据库的事务持久性和可恢复性。 该参数的单位是字节,表示WAL文件的最大大小。当WAL文件大小达到max_wal_size指定的值时,PostgreSQL会自动触发...
问Postgres max_wal_size和wal_keep_size参数ENwal全称是write ahead log，是postgresql中的online redo ...
在编译安装的时候可以指定--with-wal-segsize=size修改默认的预写日志文件大小。 wal_level=replica fsync=on max_wal_size = 1GB min_wal_size = 80MB wal_level=replica 三个级别。 minimal 不能通过基础备份和预写日志恢复数据库。 replica 该级别支持预写日志的归档和复制。 logical 在replica级别的基础智...
checkpoint_completion_target=0.1checkpoint_timeout=30minshared_buffers=20Gmin_wal_size=1GBmax_wal_size=4GB 其中的max_wal_size和min_wal_size官方含义如下所示。 max_wal_size (integer): Maximum size to let the WAL grow to between automatic WAL checkpoints. This is a soft limit; WAL size can ...
#wal_buffers = -1 # min 32kB, -1 sets based on shared_buffers # (change requires restart) #wal_writer_delay = 200ms # 1-10000 milliseconds #checkpoint_timeout = 5min # range 30s-1d max_wal_size = 1GB min_wal_size = 80MB ...
并不是说满max_wal_size才会产生检查点,而是看CheckPointSegments(ConvertToXSegs(max_wal_size_mb, wal_segment_size)/(1.0 + CheckPointCompletionTarget))参数,因为做检查点也需要消费一些wal日志,XLogWrite时通过XLogCheckpointNeeded检查是否需要触发检查点。3.min_wal_size:只要WAL日志的磁盘用量保持在这个设置...
max_wal_size=32GB min_wal_size=16GB archive_mode=on max_wal_senders=64 wal_keep_segments=15 wal_sender_timeout=60s max_replication_slots=64 hot_standby_feedback=off #log optimization log_destination='csvlog' logging_collector=on log_directory='/pg12.4/logs'# 日志存放路径,提前规划在系统上...
5mins of Postgres E10: max_wal_size, Postgres full page writes and UUID vs BIGINT primary keys24 March, 2022 In today’s episode 10, we'll take a look at max_wal_size, full-page writes and why you might want to choose BIGINT instead of a UUID for your primary key column. Share...
描述: 这是用于写前日志(WAL)的缓冲区大小。 设置: 对于大多数应用,16MB 是一个合理的默认值。 7. 其他注意事项 连接数: 调整 max_connections 和 max_worker_processes 来匹配服务器的能力。 调整方法 编辑PostgreSQL 配置文件: 通常是 postgresql.conf。
2.max_wal_size: Maximum size to let the WAL grow to between automatic WAL checkpoints. The default is 1 GB. Increasing this parameter can increase the amount of time needed for crash recovery. If we set both the parameters, checkpoint triggers whichever comes first. ...