SETsynchronous_commit='remote_write'; 可以在建立连接的时候,设置: "host=hostname user=postgres ... options='-c synchronous_commit=off' 3.用户级别 ALTERUSERtrans_userSETsynchronous_commit=ON;ALTERUSERreport_userSETsynchronous_commit=OFF; 4.数据库级别 ALTERDATABASE reportingSETsynchronous_commit=OFF;...
primary_conninfo = 'user=replica_user password=123456 channel_binding=disable host=1.1.1.1 port=1234 sslmode=disable sslcompression=0 sslcertmode=disable sslsni=1 ssl_min_protocol_version=TLSv1.2 gssencmode=disable krbsrvname=postgres gssdelegation=0 target_session_attrs=any load_balance_hosts=dis...
如果没有同步备机synchronous_standby_names为空,则synchronous_commit:on、remote_apply、remote_write和local的设置都提供相同级别的同步级别:事务提交只等待本地刷新到磁盘。不同值对性能的影响: off (async) > on (async) > remote_write (sync) > on|local (sync) > remote_apply (sync) 那么当选择完全异...
PostgreSQL作为一个高度可扩展且功能丰富的开源关系型数据库管理系统，提供了多种数据同步机制来保证数据的...
Unlike other commit scope kinds, such asGROUP COMMITandCAMO, the transactions in aSYNCHRONOUS COMMIToperation aren't transformed into a two-phase commit (2PC) transaction. They work more like a Postgressynchronous_commit. Example In this example, when this commit scope is in use, any node in ...
In order to set up synchronous replication, you need to configure synchronous_standby_name and synchronous_commit parameters in the postgresql.conf file. The synchronous_commit parameter can have following values: off, on, remote_write, remote_apply (a Postgres 9.6 feature), and local. ...
The v2.0 branches are amp_v2 in all packages except the main Amp package, loop package, and postgres package, where v2.0 is the master branch. Icicle Icicle is a PHP library for writing asynchronous code using synchronous coding techniques. Icicle uses Coroutines built with Awaitables and ...
synchronous_commit 指定在命令返回”success”指示给客户端之前,一个事务是否需要等待 WAL 记录被写入磁盘。 合法的值是{local,remote_write,remote_apply,on,off} 默认的并且安全的设置是on。 不同于fsync,将这个参数设置为off不会产生数据库不一致性的风险:一个操作系统或数据库崩溃可能会造成一些最近据说已提交的...