| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> |
| Cc: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Jignesh K(dot) Shah" <J(dot)K(dot)Shah(at)Sun(dot)COM>, <pgsql-hackers(at)postgresql(dot)org>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com> |
| Subject: | Re: LDC - Load Distributed Checkpoints with PG8.3b2 on Solaris |
| Date: | 2007-11-15 10:08:13 |
| Message-ID: | 87sl37x1ma.fsf@oxford.xeocode.com |
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| Lists: | pgsql-hackers |
"Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> writes:
> Tom Lane wrote:
>> Looking at the autovacuum log output,
>>
>>> 2007-11-13 09:21:19.830 PST 9458 LOG: automatic vacuum of table
>>> "specdb.public.txn_log_table": index scans: 1
>>> pages: 11 removed, 105 remain
>>> tuples: 3147 removed, 40 remain
>>> system usage: CPU 0.11s/0.09u sec elapsed 6.02 sec
>>
>> it seems like a serious omission that this gives you no hint how many
>> pages were scanned.
>
> Isn't it pages removed + remain? 116 in this case.
How do 40 tuples take 105 pages?
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's Slony Replication support!
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