[syslog-ng] Increase file descriptors for syslog-ng.

vijay amruth vijayamruth at gmail.com
Fri Mar 10 19:25:08 UTC 2017

Thank you very much. Where can I get 3.9.1 version? I tried to look it up,
couldn't find it.

Thank you.
On Thu, Mar 9, 2017 at 9:24 PM Scheidler, Bal√°zs <
balazs.scheidler at balabit.com> wrote:

> On Mar 10, 2017 2:59 AM, "vijay amruth" <vijayamruth at gmail.com> wrote:
> Hello everyone, Hope you are all doing great.
> I am running into some issues with syslog-ng file descriptors, I have
> tried to set up ulimit -n value to 65535,
> *open files                      (-n) 65535*
> set the parameter to the follwoing in /etc/sysctl.conf, *fs.file-max =
> 512000*
> and tried raising the value with syslog-ng --fd-limit <number>, I get the
> following error
> ####syslog-ng --fd-limit 8192
> WARNING: Configuration file format is too old, syslog-ng is running in
> compatibility mode Please update it to use the syslog-ng 3.5 format at your
> time of convinience, compatibility mode can operate less efficiently in
> some cases. To upgrade the configuration, please review the warnings about
> incompatible changes printed by syslog-ng, and once completed change the
> @version header at the top of the configuration file.;
> WARNING: global: the default value of log_fifo_size() has changed to 10000
> in syslog-ng 3.3 to reflect log_iw_size() changes for tcp()/udp() window
> size changes;
> Using a global log-fetch-limit() option was removed, please use a
> per-source log-fetch-limit();
> WARNING: window sizing for tcp sources were changed in syslog-ng 3.3, the
> configuration value was divided by the value of max-connections(). The
> result was too small, clamping to 100 entries. Ensure you have a proper
> log_fifo_size setting to avoid message loss.; orig_log_iw_size='0',
> new_log_iw_size='100', min_log_fifo_size='1300000'
> These errors are not related to the FD limit setting, rather it tries you
> that your config version is older than your syslog-ng version, and as
> number of changes were made since the version you were previously using.
> You should either remove the offending options, or adjust their value.
> log-fifo-size needs to be at least 10000
> log-iw-site should probably be removed
> log-fetch-limit should probably be removed as well.
> Once you are done with these changes, increase @version at the top of the
> file, then the warnings should be gone.
> The FD limit is probably set properly, the warnings had nothing to do with
> that. You just need to make sure to add this parameter to the startup
> options.
> and I am unable to  stop the syslog-ng service using systemctl, it
> immediately re-starts, I am using centOS 7.2, I have noticed few other
> people on the internet had the same problem, please advice, any help is
> appreciated.
> *OS: CentOS 7.2*
> *Hardware : VM*
> *Problems : 1) Unable to increase the file descriptors for syslog-ng. 2)
> Unable to stop the service using systemctl stop command, it automatically
> restarts right after with a new pid.*
> You seem to be using 3.5.x please upgrade to 3.9.1. We did a number of
> improvements wrt systemd in recent versions.
> ______________________________________________________________________________
> Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
> Documentation:
> http://www.balabit.com/support/documentation/?product=syslog-ng
> FAQ: http://www.balabit.com/wiki/syslog-ng-faq
> --
Vijay Amrut.
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