Re: too many open files - user.dat
By: DaiTengu to All on Sat May 28 2022 02:24 pm

I'm running into an issue where my system will lock up due to too many open files. It's been happening for a couple months. I upped the open file limit, but that didn't seem to help.

[root@bbs ctrl]# ulimit -a
open files (-n) 950000

Unless you're running the bbs as 'root' (and I hope you're not), this isn't really relevant. You need to adjust the open file limit for the user that sbbs is run as:
http://wiki.synchro.net/faq:nix#maximum_open_files

Now, when I checked, lsof | wc -l only showed about 72K open files.

Unfortunately, lsof is not accurate with multi-threaded programs since it'll list/count all open files for the process, repeated for each thread of the process. So lsof will report a much larger number than the actual number of open files.

the
majority were by sbbs/term, and sbbs/http to /sbbs/data/user/user.dat

after killing sbbs and restarting, my open files were down to 12k.

The kicker is, 72k is far less than the 950K my system allows. is there an open file limit built into SBBS?

No. I suspect you just haven't correctly adjusted your open file limit for the sbbs user/process yet.
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DaiTengu wrote to Digital Man <=-

Re: too many open files - user.dat
By: Digital Man to DaiTengu on Sat May 28 2022 12:42 pm

Unless you're running the bbs as 'root' (and I hope you're not), this isn't really relevant. You need to adjust the open file limit for the user that sbbs is run as: http://wiki.synchro.net/faq:nix#maximum_open_files

Found the problem, which the wiki link helped me with. I had to
up the open file limit in the systemd start config. I had it set
to 950k for both users and root, but didn't update the startup
config.

LimitNOFILE=150000

Have I ever mentioned how much I hate systemd? :)

Slackware.
MX Linux.
Devuan.
<a few more>

;-)



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DaiTengu wrote to Gamgee <=-

Slackware.
MX Linux.
Devuan.
<a few more>

Gentoo can run on either. My BBS runs under CentOS though, as
it was just easier to deal with for the most part.

at some point I need to move it to CentOS 8 or 9. Or maybe Rocky.

Okay..... but <confused look> that isn't going to solve anything
regarding using 'systemd', which is what the whole point of my comment
was...

Are you locked in to running it only on RedHat variants, or something?



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Re: Re: too many open files - user.dat
By: Gamgee to DaiTengu on Mon May 30 2022 08:33 am

Are you locked in to running it only on RedHat variants, or something?

Maybe he prefers it because of familiarity? I certainly prefer Debian, although I started on Slackware in the early 90's, and use SuSE at work currently (because we're licensed, and run software packaged for it) and Amazon Linux, because that's the best-supported distro to run on an EC2 instance.

o
(O)
BeLLy

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DaiTengu wrote to Gamgee <=-

Gentoo can run on either. My BBS runs under CentOS though, as
it was just easier to deal with for the most part.

at some point I need to move it to CentOS 8 or 9. Or maybe Rocky.

Okay..... but <confused look> that isn't going to solve anything
regarding using 'systemd', which is what the whole point of my comment was...

I can hate systemd and still use it.

Sure. Just seems a little odd. I also hate systemd and won't use a
distro for that very reason.

RedHat variants are my OS of choice for systems I want to "just
work" because I'm familiar with them.

Okey dokey.



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On Sat, 28 May 2022 14:24:51 -0500
"DaiTengu" <daitengu@VERT/ENSEMBLE> wrote:

I'm running into an issue where my system will lock up due to too
many open files. It's been happening for a couple months. I upped
the open file limit, but that didn't seem to help.

Digital Man submitted a fix this afternoon which may address the open
files issue. Mine seem to be at a steady level for now so you may want
to update.
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