Re: Table size is constantly growing and causing performance problems

From: Mahesh Shetty <maheshetty20(at)gmail(dot)com>
To: srinivasan s <srinioracledba7(at)gmail(dot)com>
Cc: shammat(at)gmx(dot)net, pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: Re: Table size is constantly growing and causing performance problems
Date: 2025-02-12 15:14:51
Message-ID: CAJPiW+gJOHxKh8XpUJvo1nYbAaZx7vFbEa1GXBtJd3a7N1XiQA@mail.gmail.com
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Yes - The tuples are inserted into the heap and checked if they are valid
as per the constraint. If it fails, it’s marked as deleted.

regards,
Mahesh Shetty

On Wed, Feb 12, 2025 at 1:53 PM srinivasan s <srinioracledba7(at)gmail(dot)com>
wrote:

> Searched yesterday's log, there were 2000+ unique constraints error. I
> don't know if it is the contributor
>
> On Wed, 12 Feb, 2025, 1:42 pm srinivasan s, <srinioracledba7(at)gmail(dot)com>
> wrote:
>
>> Hi Mahesh, I see unique constraint violation errors on the logs, is this
>> anyway related to the issue that I explained?
>>
>> On Wed, Feb 12, 2025 at 1:23 PM Mahesh Shetty <maheshetty20(at)gmail(dot)com>
>> wrote:
>>
>>> Do you see "duplicate key violations" in the logs ?
>>>
>>> Regards,
>>> Mahesh Shetty
>>>
>>>
>>>
>>> On Wed, 12 Feb 2025 at 13:13, srinivasan s <srinioracledba7(at)gmail(dot)com>
>>> wrote:
>>>
>>>> Hi Shammat,
>>>>
>>>> There were some very old idle sessions waiting for clientread, which we
>>>> have killed. no idle in transaction for a long time
>>>>
>>>>
>>>> On Wed, Feb 12, 2025 at 1:08 PM <shammat(at)gmx(dot)net> wrote:
>>>>
>>>>> srinivasan s schrieb am 12.02.2025 um 05:44:
>>>>> > One of the tables in our database suddenly started growing very
>>>>> > fast without any changes to the environment. it has grown over 10GB
>>>>> > in the last week and this is causing performance issues. We ended up
>>>>> > adding an index to solve the performance problem but the table
>>>>> > growth didn't stop. It is growing continuously. we are using
>>>>> > postgres version 12 on ubuntu
>>>>> >
>>>>> > 3. Also noticed that there is a auto vacuum job running on the table
>>>>> with (to prevent wraparound)
>>>>>
>>>>> Do you have any connections with the state "idle in transaction"? They
>>>>> would prevent (auto) vacuum.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>

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