Re: what change in postgres 9.5 improvements for multi-CPU machines - Mailing list pgsql-general

From Andres Freund
Subject Re: what change in postgres 9.5 improvements for multi-CPU machines
Date
Msg-id 20160817010252.u2earzjv6265e3nl@alap3.anarazel.de
Whole thread Raw
In response to what change in postgres 9.5 improvements for multi-CPU machines  ("657985552@qq.com" <657985552@qq.com>)
List pgsql-general
On 2016-03-25 18:11:21 +0800, 657985552@qq.com wrote:
> hello everyone:
>       I was bothered by the postgres spinlock for a long time . How to understand this sentence "postgres 9.5
performanceimprovements for multi-CPU machines" 
> at present my database is 9.3.5 。  Can  it solve the  spinlock problem, if upgrade it to 9.5 ?

It's quite possible that the upgrade helps. But without additional data
it's hard to say. The change is that postgres internal reader/writer
lock now, in many cases, avoid the use of a spinlock, relying on atomic
operations instead.

Regards,

Andres


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