Ilya Bazylchuk ilya.bazylc...@gmail.com wrote:
Hey Guys,
We have problems with DB connection in unicorn. When workers work some
hours we see in Postgres activity stucks connections with query
COMMIT. After restart unicorn it work fine some time, then
connections stucks again.
database.yml
adapter: postgis
postgis_extension: true
schema_search_path: public,postgis
encoding: utf8
pool: 5
checkout_timeout: 10
unicorn 4.8.2
pg 0.17.1
rails 3.2.17
I'm not familiar with postgis. Is there any sort of idle timeout on the
database side? Is this high or low traffic when things get stuck?
I think the postgis/pg adapter guys might be able to help, too, since
unicorn doesn't do anything with the DB connections itself.
Some generic, DB-independent thoughts/questions:
Sometimes, tiny socket buffer sizes with the DB connection might hit this.
Any non-standard kernel/socket knobs or tuning?
Also, if running Linux, which kernel version are you running? If it's
3.7, make sure commit 8fb74b9fb2b182d54beee592350d9ea1f325917a
(mm: compaction: partially revert capture of suitable high-order page)
got backported.
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