Re: Is the unfair lwlock behavior intended?

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От
Andres Freund
Тема
Re: Is the unfair lwlock behavior intended?
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в 19:26:52
Msg-id
20160525192644.tgep4offdk5fcu75@alap3.anarazel.de
Ответ на
Is the unfair lwlock behavior intended? (Tsunakawa, Takayuki)
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Is the unfair lwlock behavior intended? "Tsunakawa, Takayuki" <tsunakawa.takay@jp.fujitsu.com>
Re: Is the unfair lwlock behavior intended? Andres Freund <andres@anarazel.de>
Re: Is the unfair lwlock behavior intended? Alexander Korotkov <a.korotkov@postgrespro.ru> 
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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