Re: [HACKERS] OK, so culicidae is *still* broken

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От Craig Ringer
Тема Re: [HACKERS] OK, so culicidae is *still* broken
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Msg-id CAMsr+YG==sYy6sHkgc_q3ahcuPMGfQRhpU2-V114VCCynSSUCg@mail.gmail.com
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Ответ на Re: [HACKERS] OK, so culicidae is *still* broken  (Tom Lane <tgl@sss.pgh.pa.us>)
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On 25 Apr. 2017 13:37, "Heikki Linnakangas" <hlinnaka@iki.fi> wrote:

For some data shared memory structures, that store no pointers, we wouldn't need to insist that they are mapped to the same address in every backend, though. In particular, shared_buffers. It wouldn't eliminate the problem, though, only make it less likely, so we'd still need to retry when it does happen.

Good point. Simply splitting out shared_buffers into a moveable segment would make a massive difference. Much less chance of losing the dice roll for mapping the fixed segment. 

Should look at what else could be made cheaply relocatable too.

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