Search Postgresql Archives

Re: pg_class (system) table increasing size.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



select * from pg_stat_sys_tables where relname = 'pg_class';

-[ RECORD 1 ]-------+-----------
relid               | 1259
schemaname          | pg_catalog
relname             | pg_class
seq_scan            | 1838
seq_tup_read        | 3177416
idx_scan            | 1027456557
idx_tup_fetch       | 959682909
n_tup_ins           | 0
n_tup_upd           | 0
n_tup_del           | 0
n_tup_hot_upd       | 0
n_live_tup          | 0
n_dead_tup          | 0
n_mod_since_analyze | 0
last_vacuum         | 
last_autovacuum     | 
last_analyze        | 
last_autoanalyze    | 
vacuum_count        | 0
autovacuum_count    | 0
analyze_count       | 0
autoanalyze_count   | 0


Yes, the size of pg_class table is of 5 GB.  However, the existing row is only 2380 only. It's got fragmented. 


From: Adrian Klaver <adrian.klaver@xxxxxxxxxxx>
Sent: Thursday, November 17, 2016 8:29 PM
To: dhaval jaiswal; David G. Johnston
Cc: pgsql-general@xxxxxxxxxxxxxx
Subject: Re: pg_class (system) table increasing size.
 
On 11/16/2016 07:08 PM, dhaval jaiswal wrote:
>
>>> Because you are creating (specific) objects.
>
> I have gone through the link and  how would i figure out which
> specific object is causing this.  Can you please elaborate more here.
>
>
> We do not have the much temporary table usage.
>
>
> Since the size is bigger (5 GB) to maintain. does it requires
> maintenance as well for thepg_class.

Should have added to my previous post. What does:

select * from pg_stat_sys_tables where relname = 'pg_class';

show?

>
>
> It seems its affecting performance.
>
>



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux