Re: Possible reasons for load average high and CPU 90% idle on RHEL 7.6

A non-obvious issue: check for stale nfs mounts.

Any process that attempts to use a non-functioning nfs mount will increase the load average by one.

And if there is some job in a loop...

Now I see the doubling of connections. A now classic problem that continues to provide me with work :)

This may be due to one or more app servers that increased the number of connections when some sql didn't run as quickly as expected, a practice that defies all logic.

On Mon, Aug 23, 2021 at 04:29 Goti <aryan.goti_at_gmail.com> wrote:

> HI Listers,
>
> We had a situation where the load average spiked to more than 2000+ and
> continued the saw way for about 45 minutes. During this entire time we had
> CPU 95% idle. One thing that was observed was that we had a sudden increase
> in the number of connections from 1800 to around 3700. We had 90Gb of free
> memory throughout when the load average spiked.
>
> Server has 48 CPU with 512 Gb of RAM running on RHEL 7.6.
>
> Is this something expected?
>
>
> Thanks,
> Goti
>

-- 
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
Principal Consultant at Pythian
Oracle ACE Alumni
Pythian Blog http://www.pythian.com/blog/author/still/
Github: https://github.com/jkstill

--
http://www.freelists.org/webpage/oracle-l