Re: Alter command getting stuck on a table
| От | Shrikant Bhende |
|---|---|
| Тема | Re: Alter command getting stuck on a table |
| Дата | |
| Msg-id | CAMTQpJB+TA-CTRyQ7rW00v-0PHMWGcfmwT_CypWSK_kcFwE=ag@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Alter command getting stuck on a table (Jerry Sievers <gsievers19@comcast.net>) |
| Список | pgsql-admin |
Hello,
Thank you all,
that helped me to get rid of the issues, using pg_locks and pg_stat_activity I was able to find out concurrent session which was not allowing to hold exclusive lock.
Thanks
On Wed, Jan 8, 2020 at 12:34 AM Jerry Sievers <gsievers19@comcast.net> wrote:
Tom Lane <tgl@sss.pgh.pa.us> writes:
> Laurenz Albe <laurenz.albe@cybertec.at> writes:
>
>> On Tue, 2020-01-07 at 14:58 +0530, Shrikant Bhende wrote:
>>> I am trying to add a column to a table but it's not working, I have also tried
>>> reindex and drop on the same table but those commands are also getting stuck.
>
>> There is a concurrent session which has an open transaction which
>> holds some lock on the table in question.
>
> Yes, that looks like the cause. The pg_locks view could help you
> find the culprit session.
Yeah, and IMO the pg_blocking_pids($blocked-guys-pid) function is pretty
snazzy too :-)
> regards, tom lane
>
>
>
--
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres.consulting@comcast.net
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