Sorting by something on bugtask (e.g. importance our default) might improve things too.
The index_scan_backwards was the primary cause of slowness : postgresql will sometimes stubbornly use a matching sort index when one exists even though the data being shown may not be current on that index (which leads to loads of misses).
Sorting by something on bugtask (e.g. importance our default) might improve things too.
The index_scan_ backwards was the primary cause of slowness : postgresql will sometimes stubbornly use a matching sort index when one exists even though the data being shown may not be current on that index (which leads to loads of misses).