| From: | Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
| Cc: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: why partition pruning doesn't work? |
| Date: | 2018-06-12 11:47:16 |
| Message-ID: | ba0c9a8d-61a8-b50b-6279-535174ac985b@2ndQuadrant.com |
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| Lists: | pgsql-hackers |
On 06/11/2018 06:41 PM, Andrew Dunstan wrote:
>
>
> On 06/11/2018 06:24 PM, Tom Lane wrote:
>>
>> If we had any buildfarm critters running valgrind on
>> RELCACHE_FORCE_RELEASE or CLOBBER_CACHE_ALWAYS builds, they'd have
>> detected use of uninitialized memory here ... but I don't think we have
>> any. (The combination of valgrind and CCA would probably be too slow to
>> be practical :-(, though maybe somebody with a fast machine could do
>> the other thing.)
>>
>>
>
>
> I don't have a fast machine, but I do have a slow machine already
> running valgrind and not doing much else :-) Let's see how lousyjack
> does with -DRELCACHE_FORCE_RELEASE
>
>
It added about 20% to the run time. That's tolerable, so I'll leave it on.
cheers
andrew
--
Andrew Dunstan https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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