RE: randomize_va_space

Checked some of my servers running both 12 and 19. All had kernel.randomize_va_space = 2. They are all running Oracle Linux Server release 7.9.

BTW, for others, the command (referenced in the note below) used to check the value was: sudo /sbin/sysctl -a | grep randomize

-joe

From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> On Behalf Of Adric Norris Sent: Wednesday, May 10, 2023 7:56 AM
To: asterger_at_earthlink.net
Cc: Oracle-List <oracle-l_at_freelists.org> Subject: Re: randomize_va_space

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I just checked our Exadata and ODA installations, including a newly-installed Cloud_at_Customer environment, and they all have kernel.randomize_va_space set to 2. It's definitely not a setting we've modified, so that's part of their stock configuration. All of our Oracle databases are 19c.

On Tue, May 9, 2023 at 5:39 PM Alan Sterger <asterger_at_earthlink.net<mailto:asterger_at_earthlink.net>> wrote: Hello Listers,

On a multi Oracle homed (12c and 19c) RHEL 7.9 server, have started to observe infrequent (every 2 months) 'ORA-00445: background process "m001" did not start after 120 seconds' errors from both 12c and 19c instances. Seeing the same error from two different Oracle releases sort of points to a server kernel issue, specifically kernel.randomize_va_space=2.

MOS Note 1345364.1 implies randomize_va_space was a thing in the past (11g,12c). However, appears Oracle is still recommending disabling in 19c on Oracle Cloud Infrastructure.

What is your on-prem randomize_va_space?

Thanks,

• Alan Sterger

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http://www.freelists.org/webpage/oracle-l Received on Wed May 10 2023 - 16:11:43 CEST