At 07:39 PM 2/11/2002 +1100, Philip Warner wrote:
And some more numbers, directly after a vacuum and analyze:To give some numbers:
mail=# explain analyze select * from often_updated where id between '-10000' and '100000';
Index Scan using barnet_users_id on often_updated (cost=0.00..3095.66 rows=750 width=205) (actual time=0.15..41.04 rows=750 loops=1)
Total runtime: 44.81 msec
mail=# explain analyze select * from often_updated;
Seq Scan on often_updated (cost=0.00..49273.50 rows=750 width=205) (actual time=1.93..1710.01 rows=750 loops=1)
Total runtime: 1714.32 msec
The latter time is actually quote good; when the machine is more heavily loaded it goes up to 10000ms.
We currently vacuum/analyze daily, and analyze hourly.
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Philip Warner | __---_____
Albatross Consulting Pty. Ltd. |----/ - \
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Fax: (+61) 0500 83 82 82 | ___________ |
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