Am using postgreSQL 8 to create a database. I have noticed that it migt suffer a problem with concurrency control.
1. please explain to me how does postgreSQL 8 handle concurrency control?
2. when comparing MY SQL with postgreSQL which of these is best to handle concurrency control.
PostgreSQL 不存在8个,有8个,8.1个,8.2个,8.3个,8.4个。 所有主要版本。 本月将发布第9.0版。
PostgreSQL uses MVCC (Multiversion Concurrency Control), as described in the manual: http://www.postgresql.org/docs/current/interactive/mvcc.html
MySQL使用不同的状态,诺行也使用MVCC。 主要的区别是,在邮政总局,一切交易都是安全的,包括像ALTER TABLE这样的DDL。
I have noticed that it migt suffer a problem with concurrency control.
你注意到什么? MVCC是一个聪明的制度,不是一个完美的制度。 但是,它对于许多数据库,如Oracle和Pe鸟类来说,做得很好。
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