am Fri, dem 28.09.2007, um 11:56:46 -0400 mailte Mike Charnoky folgendes:
> Hi,
>
> I am still having problems performing a count(*) on a large table. This
>
> Now, certain count(*) queries are failing to complete for certain time
> ranges (I killed the query after about 24 hours). The table is indexed
> on a timestamp field. Here is one query that hangs:
Again: an index can't help! Because of MVCC: 'select count(*)' without
WHERE-condition forces an seq. table-scan.
Andreas
--
Andreas Kretschmer
Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net