Обсуждение: After upgrade from 9.2.9 to 9.3.5 got reduced contention
After a week or so since upgrade from 9.2.9 to 9.3.5 I'm very surprised (in a good way) by the gain of performance. Most noticeable change is the reduced contention for records by exclusive/shared locks. I can see increased numbers of requests fulfilled per minute (but I can't be exact on those numbers, just I can see graph going high - which is good). Also, I've noticed that backup time dropped from 44 minutes to 30 minutes (for about 60Gb in multiple databases) - which is really good change (35% decrease) on same hardware. I still had no time to measure how much gain on improved indexing and other topics I know received improvements. Thanks, PostgreSQL team! Regards, Edson
On Sat, Sep 13, 2014 at 07:44:44PM -0300, Edson Carlos Ericksson Richter wrote: > After a week or so since upgrade from 9.2.9 to 9.3.5 I'm very > surprised (in a good way) by the gain of performance. > > Most noticeable change is the reduced contention for records by > exclusive/shared locks. > > I can see increased numbers of requests fulfilled per minute (but I > can't be exact on those numbers, just I can see graph going high - > which is good). That is very good. The new key-value locking must have helped here. It was very hard to implement, but I am glad it is showing a benefit. -- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. +