| From: | Anton Melser <melser(dot)anton(at)gmail(dot)com> |
|---|---|
| To: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
| Cc: | "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Plan differences |
| Date: | 2015-12-31 14:49:54 |
| Message-ID: | CAKywjPrzXohDWicSN4UqY3s05xkkY0Qnv+CSxPNfCErVFMNwEQ@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-performance |
Hi,
It is looking like some missing optimization that was removed from RC
> release.
>
Thanks. Is there some discussion of why these optimisations were removed? I
started looking at some of the more complicated queries I do and there are
many occasions where there are 10-30x performance degradations compared
with the RC. Not what I was hoping for with a much more powerful machine!
Were these optimisations really dangerous? Is there any (easy and safe) way
to get them back or would I need to reinstall an RC version?
Thanks again,
Anton
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