Hi Alvaro,
On 18/08/15 17:41, Alvaro Herrera wrote:
Alvaro Herrera wrote:
One thing to look at is the rate of WAL generation for a set number of
transactions. Maybe the later releases are generating more WAL due to
multixacts, for instance (prior to 9.3 these weren't wal-logged.)
Also try 9.5alpha2, wherein bug #8470 is fixed, which is a big
performance regression in 9.3 and 9.4.
Unfortunately I can't get into alpha releases, nor beta. This server
will go into production in around 7 days time.
I had a month to get this dealt with originally, two weeks were spent
tweaking 9.2.13 (provided from CentOS base) with the intention of
staying with that version.
Then I wanted to see better TPS on high client numbers and moved to 9.4,
even this took a little persuasion with my colleague... 9.5 is
definitely a no.
Thanks
Michael
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