今天我们不聊技术不聊故障,就聊聊《PostgreSQL 14 internal》这本书(不少读者和我反馈故障写多了是不是变相劝退 )。在今天,我也终于将初稿全部翻译完成了,统计了一下,初稿总计159513个字,工作量确实不小。 从最开始萌生翻译的想法,到说干就干,耗时总共约七个月,今天终于完成了初稿的翻译,特以此篇纪念一下。
哦对了,还有一点让笔者抓脑壳的地方,就是书名,此书原名是 14 internal,我最开始想着取为"PostgreSQL 14 内幕原理",但是清华出版社的老师说现在不让用"内幕"一词了,或许"内核原理"、"内幕指南"等等也成,暂时还没有敲定,容我再琢磨琢磨,各位读者有好的建议也欢迎下方留言讨论,一经采纳,定当感激不尽,我也会额...
基础统计信息保存在pg_class中,主要是下面3项: reltuples:表预估行数,也是执行计划里row=的来源之一,pg 14用-1表示没收集过统计信息,以区分于空表 relpages:表预估页数 relpages relallvisible :vm(visibility map)文件中被标记的页数 SELECT reltuples::numeric, relpages, relallvisible FROM pg_class WHERE...
autovacuum_freeze_max_age:自上次冻结后,经过多少元组年龄,元组对应表会强制触发autovacuum(即便设置为off),默认值为2亿,最大值为20亿。 vacuum_failsafe_age:pg 14新参数,当出现事务id回卷风险(元组年龄大于vacuum_failsafe_age)时,以最快速度完成冻结操作。默认值为16亿,pg假设此变量值大于autovacuum_freeze_max_...
*Re-read config files,and tell children todosame.*/staticvoidprocess_pm_reload_request(void){pending_pm_reload_request=false;ereport(DEBUG2,(errmsg_internal("postmaster received reload request signal")));if(Shutdown<=SmartShutdown){ereport(LOG,(errmsg("received SIGHUP, reloading configuration fi...
prefix=yyxdebezium.source.key.converter.schemas.enable=falsedebezium.source.value.converter.schemas.enable=falsedebezium.source.schema.history.internal.kafka.bootstrap.servers=127.0.0.1:9092debezium.source.schema.history.internal.kafka.topic=pg_schema_historydebezium.source.decimal.handling.mode=stringdebezium...
pglogical.use_spi Tells PGLogical to use SPI interface to form actual SQL (INSERT, UPDATE, DELETE) statements to apply incoming changes instead of using internal low level interface. This is mainly useful for Postgres-XL and debugging purposes. The default in PostgreSQL is false. This can be ...
distributed database like Citus. Instead of implementing new functionality, Citus can just rely on Postgres. For example, Postgres generates aQuery Treeto hold a SQL statement’s internal representation. Citus then uses Postgres functions to copy, traverse, or manip...
internal_query string Internal query that led to the error internal_position number Cursor index into internal query context string Error context statement string Client-supplied query string cursor_position string Cursor index into query string func_name string Error location function name file_name ...
search dmz-kong.svc.cluster.local svc.cluster.local cluster.local13jqinnqegaetjxzt0guttm2sb.gx.internal.cloudapp.net nameserver 10.0.0.10 options ndots:5 one time i did get the following output from kong migrations list $ kong migrations list ...