Re: finding queries doing sequential search

wambacher@posteo.de wrote:
> i have a very big table (PostGIS OpenStreetMap data, but that does not mapper)
> with about 380 million records and a size of 275 GB + Indices.
> Permanently updated and growing.
> Of course i enabled autovacuum.
> The log shows me 8.2 Mio index scans (iscan), which is fine,  and right now
> 424 sequential scans (sscan) for planet_osm_polygon. see attached image.
> I want to locate the query doing this stuff but EXPLAIN won't help because
> most querys are dynamicly created.
> Is there a way/trick do this?

With a big table it shouldn't be a problem.

Set log_min_duration_statement = 10000 or similar, and all long running
statements will be logged.  The sequential scans should be among them.

Yours,
Laurenz Albe
-- 
Cybertec | https://www.cybertec-postgresql.com