Memory pressure on Cloud at customer solution with EXADATA

From: Jack van Zanen <>
Date: Tue, 21 May 2019 09:53:20 +1000
Message-ID: <>

Hi All,

PSU Jan 2019
Kernel version: 4.1.12-124.24.3.el6uek.x86_64 #2 SMP Mon Jan 14 15:08:09 PST 2019 x86_64

we have a 2 node RAC/Exadata solution and have configured about 500GB of 720GB memory for Huge Pages.
Now this is over configured at the moment as we have decommissioned some databases. This is our combined TEST/DR environment and we could spin up more containers at any time.

Last week we had node 1 crash and oracle support came back saying it was due to memory pressure and we need to configure fewer Huge Pages.

While in theory that makes sense but I am struggling to understand why a system with 200G+ memory not allocated to huge pages is crashing due to memory issues. I have checked our alert logs and the databases start using huge pages.

Anyone here can explain to me how this can happen, as oracle support keep repeating to lower the configured huge pages.

Jack van Zanen

This e-mail and any attachments may contain confidential material for the sole use of the intended recipient. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of this e-mail or any attachment is prohibited. If you have received this e-mail in error, please contact the sender and delete all copies.
Thank you for your cooperation

-- Received on Tue May 21 2019 - 01:53:20 CEST

Original text of this message