Hello,
the default statistics target is:
powa=# show default_statistics_target ;
default_statistics_target
---------------------------
2500
(1 row)
So I've changed it to the default:
powa=# ALTER TABLE testcase_t3 ALTER COLUMN records SET STATISTICS 100;
ALTER TABLE
The memory consumption drops down to ~ 1.1GB
So you were right, thanks!
I thought it was a bug, but possibly it is only a space for an improvement for adding a potential limit for similar cases.
Kind regards Ales Zeleny
PG Bug reporting form <noreply@postgresql.org> writes:
> Is there more I can do to identify why analyze uses that much memory?
What have you got default_statistics_target set to?
You might need to decrease the stats target for that composite-array
column. compute_array_stats is fairly aggressive about how much
data it will try to collect, and I can believe that that'd add up
when the array elements are of a wide composite type.
regards, tom lane
