The queries in question (select's) occasionally take up to 5 mins even
if they take ~2-3 sec under "normal" conditions, there are no sequencial
scans done in those queries. There are not many users connected (around
3, maybe) to this database usually since it's still in a testing phase.
I tried to hunt down the problem by playing around with resource usage
cfg options but it didn't really made a difference.
Could that be caused by a CHECKPOINT ?
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