#49 WARNING on module filesopen

[Rob Brandt]

Hi. I am getting this message nightly - about 50 emails - for the last few days. Since that time, the server has also been horrendously slow. I am hoping that solving this will solve that as well. Full message:

WARNING on module filesopen main::execute_mono(/etc/webmin/sysstats/sysstats.pl 136) : timeout on filesopen after 4 seconds

I have seen the other tickets here for this warning but they've not helped for a solution. When I do lsof I get a lot of files listed, predominantly of mysql. There are only 3 databases with substantial records and traffic.

This comes about 2 weeks after I upgraded the server from Ubuntu 16.04 to Ubuntu 20.04. It ran very well for 7-10 days before starting to have these issues.

Ideas?

[eric gerbier]

the timeout tells that the command lsof is very slow. It can be a load problem (is the load high ?)
or a high number of open files.
You can change the default timeout on the filesopen module, to avoid warnings emails.
(the command 'time lsof' will give you an idea for a "good" value)
Now why ? I guess the that the mysql config file was changed with the update , but I am not a mysql specialist.