From: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
---|---|
To: | postggen2020 s <postggen2020(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org, pgsql-admin(at)postgresql(dot)org |
Subject: | Re: Reset DB stats suggestion pg_stat_reset() |
Date: | 2020-02-23 19:25:27 |
Message-ID: | 78fe4c74-0dfe-aea8-9d27-9d5c06c3f5c1@aklaver.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-admin pgsql-general |
On 2/23/20 10:19 AM, Adrian Klaver wrote:
> On 2/22/20 6:40 PM, postggen2020 s wrote:
>> Thanks Adrian.
>> I am aware about the functions. Here need is, can we use this?.or is
>> there any known effects after firing the functions?.
>
> Yes the stats counters will be reset to 0, which means the planner will
> not have accurate statistics to work with. That can be corrected with an
> ANALYZE.
I should have listened to the little voice that told me to confirm the
above. The reset will reset the counters in the tables listed here:
https://www.postgresql.org/docs/12/monitoring-stats.html#MONITORING-STATS-VIEWS
It does not change the statistics here:
https://www.postgresql.org/docs/12/catalog-pg-statistic.html
Therefore an ANALYZE is not strictly required.
The questions below still hold though.
The questions I have are:
>
> What is the issue you are trying to deal with?
>
> Also why do you think resetting the stats will fix it?
>
>
>>
>> Thanks,
>> Postgann.
>>
>> On Sat, Feb 22, 2020 at 10:47 PM Adrian Klaver
>> <adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>> wrote:
>>
>> On 2/22/20 12:26 AM, postggen2020 s wrote:
>> > Hi Team,
>> >
>> > Good Afternoon,
>> >
>> > We have seen some deadlocks and tempfile count in
>> pg_stat_database view.
>> > We are trying to reset the stats.
>> > Can we use pg_stat_reset() function to reset these stats
>> without any
>> > impact stats of databases.
>> > Please advise the process to reset the stats.
>>
>> See here:
>>
>> https://www.postgresql.org/docs/12/monitoring-stats.html
>>
>> Table 27.20. Additional Statistics Functions
>>
>> It details what your options are.
>>
>> >
>> > Thanks.
>> > Postggen.
>>
>>
>> -- Adrian Klaver
>> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>>
>
>
--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com
From | Date | Subject | |
---|---|---|---|
Next Message | Aditya Toshniwal | 2020-02-24 06:46:08 | PG v12.2 - Setting jit_above_cost is causing the server to crash |
Previous Message | Adrian Klaver | 2020-02-23 18:19:34 | Re: Reset DB stats suggestion pg_stat_reset() |
From | Date | Subject | |
---|---|---|---|
Next Message | Edson Richter | 2020-02-23 21:00:25 | RE: Replication: slave server has 3x size of production server? |
Previous Message | Andrus | 2020-02-23 19:15:55 | Re: How to get error message details from libpq based psqlODBC driver (regression) |