| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | List pgsql-patches <pgsql-patches(at)postgresql(dot)org>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [PATCHES] Infrastructure changes for recovery |
| Date: | 2008-09-29 12:46:46 |
| Message-ID: | 10307.1222692406@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> ... That kinda works, but the problem is that restartpoints are time based,
> not log based. We need them to be deterministic for us to rely upon them
> in the above way.
Right, but the performance disadvantages of making them strictly
log-distance-based are pretty daunting. We don't really want slaves
doing that while they're in catchup mode.
regards, tom lane
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