| From: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
|---|---|
| To: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp>, alvherre(at)commandprompt(dot)com, peter_e(at)gmx(dot)net, pgsql-hackers(at)postgresql(dot)org, pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: [PATCHES] pg_freespacemap question |
| Date: | 2006-03-19 23:33:33 |
| Message-ID: | 441DEA4D.9000804@paradise.net.nz |
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| Lists: | pgsql-hackers pgsql-patches |
Mark Kirkwood wrote:
> Tom Lane wrote:
>
>>
>> I do notice a rather serious shortcoming of pg_freespacemap in its
>> current incarnation, which is that it *only* shows you the per-page free
>> space data, and not any of the information that would let you determine
>> what the FSM is doing to filter the raw data. The per-relation
>> avgRequest and lastPageCount fields would be interesting for instance.
>> Perhaps there should be a second view with one row per relation to
>> carry the appropriate data.
>>
>
> Ok - I did wonder about 2 views, but was unsure if the per-relation
> stuff was interesting. Given that it looks like it is interesting, I'll
> see about getting a second view going.
>
This patch implements the second view for FSM relations. I have renamed
the functions and views to be:
pg_freespacemap_relations
pg_freespacemap_pages
This patch depends on the previous one (which was called simply
'pg_freespacemap.patch').
Cheers
Mark
| Attachment | Content-Type | Size |
|---|---|---|
| pg_freespacemap-1.patch.gz | application/gzip | 4.8 KB |
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