Re: Prepared statements generating a lot of temp files.

[MichaelDBA <MichaelDBA@xxxxxxxxxxx>]

Perhaps take the other approach: increase work_mem to make the bulk inserts fit into memory.  You can easily undo work_mem changes.  It only requires a sighup: reload, not restart.
What memory do you have now and what is work_mem currently set to?  Also, have many concurrent, active connections do you average at a time?

Regards,
Michael Vitale



Karthik Krishnakumar wrote on 3/23/2023 5:59 AM:

thanks - checked with the devs and it does look like the application is doing some sort of a bulk insert, and at the moment it cannot be changed to use "COPY FROM".

will limiting bulk inserts to match the work_mem(assuming this is the guc that is used in this case) reduce this disk activity?

thanks,

karthik

---- On Thu, 23 Mar 2023 14:43:19 +0530 <Michaeldba@xxxxxxxxxxx> wrote ---

Look at the size of the bind variables and also whether you are doing bulk inserts

Sent from my iPad

On Mar 23, 2023, at 5:10 AM, Karthik Krishnakumar <karthikk@xxxxxxxxxxxx> wrote:



Hi admins,

I am analyzing temp files being generated using pg_badger.

Under "queries generating the most temporary files", I am finding insert/update queries (via prepared statements) writing a lot of data to temp files.

I am trying to figure why inserts are generating such temp files.

Why are inserts/updates generating temp files?

what can be done to avoid this ?

thanks,

karthik

Regards,

Michael Vitale

Michaeldba@xxxxxxxxxxx

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