Обсуждение: Synchronization Primitives
Hi all:<br /><br /> I am a fresh men in PostgreSQL. And i work on benchmark study these days using PostgreSQL.<br /><br/>Now i have a question: Is there some way to show the lock contention of PostgreSQL?<br /><br />As I know, you canuse <b>show mutex status</b> in MySQL to find which mutex is hot. But i don't know in<br /><br />PostgreSQL.<br /><br/> Any ideas?<br /><br /> Thanks!<br /><br /> <br /><br />
On Thu, 2008-11-13 at 18:55 +0800, 崔岩ccuiyyan@sina.com wrote: > Hi all: > > I am a fresh men in PostgreSQL. And i work on benchmark study > these days using PostgreSQL. > > Now i have a question: Is there some way to show the lock contention > of PostgreSQL? > > As I know, you can use show mutex status in MySQL to find which mutex > is hot. But i don't know in PostgreSQL. look at pg_locks system view -- ------------------------------------------ Hannu Krosing http://www.2ndQuadrant.com PostgreSQL Scalability and Availability Services, Consulting and Training
Hi, Hannu Krosing wrote: >> As I know, you can use show mutex status in MySQL to find which mutex >> is hot. But i don't know in PostgreSQL. > > look at pg_locks system view Or read about dtrace to analyze lower level locking contention: http://www.postgresql.org/docs/8.3/static/dynamic-trace.html Regards Markus Wanner