Re: Ned to understand why all the idle connections
От | Si Chen |
---|---|
Тема | Re: Ned to understand why all the idle connections |
Дата | |
Msg-id | CAAYSSjPGHt65GuF1UO7=53vqV5fgdW=pBysregqnR6wqLWNZAQ@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Ned to understand why all the idle connections ("David G. Johnston" <david.g.johnston@gmail.com>) |
Ответы |
Re: Ned to understand why all the idle connections
|
Список | pgsql-general |
pid | wait_event | state_change | backend_start | xact_start | query_start | ?column? | query
-------+------------+-------------------------------+-------------------------------+------------+-------------------------------+-----------------+--------
32506 | ClientRead | 2020-04-23 09:29:05.6793-07 | 2020-04-23 01:00:19.612478-07 | | 2020-04-23 09:29:05.679275-07 | 00:00:00.000025 | COMMIT
32506 | ClientRead | 2020-04-23 09:30:33.247119-07 | 2020-04-23 01:00:19.612478-07 | | 2020-04-23 09:30:33.247109-07 | 00:00:00.00001 | COMMIT
32506 | ClientRead | 2020-04-23 09:31:31.506914-07 | 2020-04-23 01:00:19.612478-07 | | 2020-04-23 09:31:31.506905-07 | 00:00:00.000009 | COMMIT
32506 | ClientRead | 2020-04-23 09:32:32.06656-07 | 2020-04-23 01:00:19.612478-07 | | 2020-04-23 09:32:32.066552-07 | 00:00:00.000008 | COMMIT
32506 | ClientRead | 2020-04-23 09:36:51.579939-07 | 2020-04-23 01:00:19.612478-07 | | 2020-04-23 09:36:51.579931-07 | 00:00:00.000008 | COMMIT
On Thursday, April 23, 2020, David Gauthier <davegauthierpg@gmail.com> wrote:Hi:psql (9.6.7, server 11.3) on linuxI have what appear to be a log of idle connections to my DB. Query of pg_stat_activity indicates well over half (127/206) are like this...dvdb=# select state_change,wait_event_type,wait_event,state,backend_type from pg_stat_activity where query = '';
state_change | wait_event_type | wait_event | state | backend_type
-------------------------------+-----------------+---------------------+-------+------------------------------
2020-04-23 12:57:58.215854-04 | Client | ClientRead | idle | client backendWhat does this indicate?The vast majority of the connections are through perl/dbi. If a connection is made, and is currently not doing anything, does it appear in pg_stat_activity as "idle" ? If, in DBI, $dbh->disconnect is used whenever the DB is no longer needed, will it disconnect from the DB and NOT appear as an idle in pg_stat_activity ?If there are any other column s in pg_stat-activity you'd like to see, or any other query in any of the system tables, please advise.If the server has an active, authenticated, connection/process running it shows up here. Yes, idle is the state used to denote the the session is “not doing anything”...$dbh->disconnect typically will indeed close the connection. There can be exceptions if your architecture uses connection pooling.David J.
В списке pgsql-general по дате отправления:
Предыдущее
От: "David G. Johnston"Дата:
Сообщение: Re: Question on banner display after PG initial connection