My previous post about slow updates w/ 7.4.2 needed a multi-column index to get speed comparable to Sybase. When I
wentto 7.4.3 (Slackware 9.1) w/ JDBC, the improvements are that it doesn't initially take much memory (have 512M) and
didn'tswap. I ran a full vaccum and a cluster, however speed degaded to 1 *second* / update of one row in 150 rows of
data,within a day! pg_autovacuum now gives excellent performance. What happened?
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