Thread: Hi All,

Hi All,

From

Ryan MYJ

Date:

18 February 2023, 03:00:18

Currently I'm working on upgrading a postgresql version from 9.3 to 12. The database size is around 700G.

I finished the pg_upgrade process but when I ran 'analyze_new_cluster.sh' it stucked at the first log 'vacuumdb: processing database "otdb": Generating minimal optimizer statistics (1 target)'.

Then I checked the active query, the following query has been running for several hours:

pid | db | start | lap | query
---------+-----------+-------------------------------+-----------------+------------------------------
1822933 | otdb | 2023-02-18 03:02:36.035755+08 | 04:56:41.408329 | ANALYZE pg_catalog.pg_class;

Do you know what I can do to speed up this process? Because on another Testing environment(around 300G data), this 'analyze_new_cluster.sh' only took several minutes to complete.

Thanks a lot.

Re: Hi All,

From

Tom Lane

Date:

21 February 2023, 17:51:14

Ryan MYJ <ryanmyj@gmail.com> writes:
> Currently I'm working on upgrading a postgresql version from 9.3 to 12. The
> database size is around 700G.
> I finished the pg_upgrade process but when I ran 'analyze_new_cluster.sh'
> it stucked at the first log 'vacuumdb: processing database "otdb":
> Generating minimal optimizer statistics (1 target)'.

> Then I checked the active query, the following query has been running for
> several hours:
>    pid   |    db     |             start             |       lap       |
>          query
> ---------+-----------+-------------------------------+-----------------+------------------------------
>  1822933 |  otdb  | 2023-02-18 03:02:36.035755+08 | 04:56:41.408329 |
> ANALYZE pg_catalog.pg_class;

You omitted the pg_stat_activity columns that could give some insight
into why this is waiting.  The first thing I'd think of though is that
it's blocked waiting for a lock, in which case looking into pg_locks
to see what is blocking it could help.

            regards, tom lane