From: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
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To: | Ayub Khan <ayub(dot)hp(at)gmail(dot)com> |
Cc: | pgsql-performance(at)lists(dot)postgresql(dot)org |
Subject: | Re: slow performance with cursor |
Date: | 2021-06-25 16:21:06 |
Message-ID: | 20210625162106.GM29179@telsasoft.com |
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Thread: | |
Lists: | pgsql-performance |
On Fri, Jun 25, 2021 at 07:09:31PM +0300, Ayub Khan wrote:
> I am using postgresql 12 and using cursors in a stored procedure,
> executing procedure which has cursor is slowing down the call. However if I
> do not use the cursor and just execute the queries using JDBC (Java client)
> it's fast.
Is the query slower, or is it slow to transfer tuples ?
I expect there would be a very high overhead if you read a large number of
tuples one at a time.
> Is there any setting which needs to be modified to improve the performance
> of cursors. Also facing slow response with reading blobs (images) from db.
> Not an ideal way for storing images in db but this is a legacy application
> and wanted to check if there a quick tweak which can improve the
> performance while reading blob data from db.
Is the slowness between the client-server or on the server side ?
Provide some details ?
--
Justin
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