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Re: Is the unfair lwlock behavior intended? - Mailing list pgsql-hackers

From Andres Freund
Subject Re: Is the unfair lwlock behavior intended?
Date
Msg-id 20160525192644.tgep4offdk5fcu75@alap3.anarazel.de
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In response to Is the unfair lwlock behavior intended?  ("Tsunakawa, Takayuki" <tsunakawa.takay@jp.fujitsu.com>)
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Hi,

On 2016-05-24 06:03:07 +0000, Tsunakawa, Takayuki wrote:
> At that time, many backend processes (I forgot the number) were acquiring and releasing share mode lock on
ProcArrayLock,most of which were from TransactionIsInProgress().
 

FWIW, I suspect that 9.6 might be a fair bit better here, due to
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=8a7d0701814a4e293efad22091d6f6fb441bbe1c

Regards,

Andres

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