Dave Cramer <pg@xxxxxxxxxxxxx> writes: >>> The other process is inserting into the user_profile table. >> >> Did either transaction do anything else in the same transaction >> previously? >> > It would appear that the insert is running before the reindex starts. That's not possible --- if it had been, the insert would already have RowExclusiveLock on the table, which would have blocked the reindex from acquiring ShareLock on the table. The reindex must already have that, since it's trying to acquire AccessExclusiveLock on one of the indexes, so there can't be any active inserts on the table. I suspect the other process must be doing a series of selects in one transaction that use indexes of the table in some random order, but that's just an educated guess at this point. BTW, what PG version is this? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings