changing d-bus limits
This document (000020405) is provided subject to the disclaimer at the end of this document.
Example message for hitting max_replies_per_connection limit as seen in /var/log/messages:
2021-10-10T12:53:24.272449+08:00 localhost systemd-logind: Failed to start session scope session-c1284.scope: The maximum number of pending replies per connection has been reached
There is a different set of limits for user sessions and for system (configured in session.conf and system.conf).
For different available limits please see the manual page of the dbus-daemon with command:
The default limits are configured during the d-bus compilation time.
On SLE15 or newer the defaults can be seen in the file /usr/share/dbus-1/system.conf and session.conf respectively.
On SLE12 and newer service packs the defaults can be seen in the source code for the dbus-1 package.
In our example the systemd-logind process is running in the system scope (as seen in the command systemd-cgls).
# systemd-cgls Control group /: -.slice ├─user.slice └─system.slice ├─haveged.service └─systemd-logind.service(output is shortened)
The default in the file system.conf is:
<!-- <limit name="max_replies_per_connection">128</limit> -->Create file /etc/dbus-1/system-local.conf with content (for user session limits it would be session-local.conf):
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-Bus Bus Configuration 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> <busconfig> <limit name="max_replies_per_connection">1200</limit> </busconfig>
Alternatively there might be some process that is not behaving correctly and uses up d-bus resources.
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- Document ID:000020405
- Creation Date: 05-Oct-2021
- Modified Date:18-Nov-2021
- SUSE Linux Enterprise Server
- SUSE Linux Enterprise Server for SAP Applications
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