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IndicatorsPool events causing memory pressure?

  • November 24, 2020 at 2:28 pm

    #3813475

    Hi,

    We are running a system on SQLServer 2017 Enterprise (RTM-CU22) with 839GB of memory.

    I think we appear to be experiencing some memory pressure as we seem to have plans dropping from the cache and I can see various clock-hands running (including CACHESTORE_OBJCP – EXTERNAL and CACHESTORE_SQLCP – EXTERNAL).

    When I check the Memory Clerks the bulk of memory is taken up by MEMORYCLERK_SQLBUFFERPOOL around 750GB, with about 26GB for CACHESTORE_OBJCP and CACHESTORE_SQLCP of around 8GB.  Typically no other clerks are over 1 GB.

    When I look in the RING_BUFFER_RESOURCE_MONITOR the only RESOURCE_MEMPHYSICAL_LOW events we see are for IndicatorsPool.

    I’m a bit at a loss as to working out what is causing the pressure and what the RESOURCE_MEMPHYSICAL_LOW for IndcatorsPool is telling me (and if this is related).

    Could anyone give me any pointers on where to look next?

    Thanks

  • November 25, 2020 at 3:10 pm

    #3813897

    Thanks for posting your issue and hopefully someone will answer soon.

    This is an automated bump to increase visibility of your question.

  • November 26, 2020 at 10:35 am

    #3814157

    Is max memory for the sql server instance set to lower than  839GB, so other applications like the operating system can run?

    Is SSAS installed on the server? There was a blogpost that the default configuration reserves 20% of ram for SSAS. Which lives 80% for OS + SQL + other programs (backup, ssis, ...)

  • November 26, 2020 at 12:48 pm

    #3814189

    Thanks for the response Jo.

    The server has 960GB with the max memory for SQLServer set to 839GB.   That along with no indications in the RING_BUFFER_RESOURCE_MONITOR of IndicatorsSystem with RESOURCE_MEMPHYSICAL_LOW make me think it isn't external to SQLServer.

    SSAS is installed but disabled and not running.

     

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