From: | Julien Rouhaud <julien(dot)rouhaud(at)dalibo(dot)com> |
---|---|
To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com> |
Cc: | Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: auto_explain sample rate |
Date: | 2016-02-16 21:24:59 |
Message-ID: | 56C393AB.7060405@dalibo.com |
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Lists: | pgsql-hackers |
On 25/08/2015 14:45, Michael Paquier wrote:
> On Fri, Jul 17, 2015 at 2:53 PM, Craig Ringer <craig(at)2ndquadrant(dot)com> wrote:
>> On 7 July 2015 at 21:37, Julien Rouhaud <julien(dot)rouhaud(at)dalibo(dot)com> wrote:
>>
>>> Well, I obviously missed that pg_srand48() is only used if the system
>>> lacks random/srandom, sorry for the noise. So yes, random() must be
>>> used instead of pg_lrand48().
>>>
>>> I'm attaching a new version of the patch fixing this issue just in case.
>>
>> Thanks for picking this up. I've been trying to find time to come back
>> to it but been swamped in priority work.
>
> For now I am marking that as returned with feedback.
>
PFA v3 of the patch, rebased on current head. It fixes the last issue
(sample a percentage of queries).
I'm adding it to the next commitfest.
--
Julien Rouhaud
http://dalibo.com - http://dalibo.org
Attachment | Content-Type | Size |
---|---|---|
auto_explain_sample_rate-v3.patch | text/x-patch | 3.0 KB |
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