| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Simon Riggs <simon(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: WAL Rate Limiting |
| Date: | 2014-01-16 15:35:20 |
| Message-ID: | 27195.1389886520@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> I don't really see much difficulty in determining what's a utility
> command and what not for the purpose of this? All utility commands which
> create WAL in O(table_size) or worse.
By that definition, INSERT, UPDATE, and DELETE can all be "utility
commands". So would a full-table-scan SELECT, if it's unfortunate
enough to run into a lot of hint-setting or HOT-pruning work.
I think possibly a more productive approach to this would be to treat
it as a session-level GUC setting, rather than hard-wiring it to affect
certain commands and not others.
regards, tom lane
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