Michael Fuhr <[EMAIL PROTECTED]> writes: > Further investigation shows that what really seems to be happening > in 8.3devel is that the statistics for shared tables are reset every > 15 seconds when autovacuum is enabled, which it is by default. I > don't observe this phenomenon when autovacuum is disabled.
OK, so it's just that pgstat_vacuum_tabstat() gets run by autovacuum. So either form of Alvaro's patch should fix it. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match