| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Greg Smith <gsmith(at)gregsmith(dot)com>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: Sorting writes during checkpoint |
| Date: | 2008-07-04 16:05:54 |
| Message-ID: | 23541.1215187554@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> Anyway, I note that we don't have an easy way of sorting by tablespace,
Say what? tablespace is the first component of relfilenode.
> but I'm sure it would be possible to look up the tablespace for a file
> within a plugin.
If the information weren't readily available from relfilenode, it would
*not* be possible for a bufmgr plugin to look it up. bufmgr is much too
low-level to be dependent on performing catalog lookups.
regards, tom lane
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