IBM Support

IBM AIX: Excessive logging and high CPU usage by syslogd with smbc

How To


Summary

When the SMB client smbc.rte is used on AIX®, an excessive number of log messages might be written to the syslog kernel facility, with syslogd consuming a lot of CPU time.

Objective

Disabling smbc syslog logging resolves the problem. However, if other problems occur with smbc, syslog logging may need to be temporarily re-enabled for diagnostic purposes.

Environment

The issue is most obvious when SMB shares are heavily used.

Steps

Note:  These instructions only apply to the 7.1.302.3 (or higher) version of smbc.rte.
Run this command to temporarily disable syslog logging by smbc. The effect is immediate--a reboot is not required. If the system is rebooted, smbc will resume logging messages to syslog.
smbctune -s "smbc_enable_syslog=0"
To disable syslog logging now and after rebooting, add the -p flag to the command in front of the -s flag.
smbctune -p -s "smbc_enable_syslog=0"
To temporarily re-enable syslog logging by smbc, run this command.
smbctune -s "smbc_enable_syslog=1"

Additional Information

SUPPORT:

If the instructions in this document do not lead to resolution of the problem, follow these instructions to open a case.  The product must be under warranty or have an active and valid support contract.

a.  Document or take screen captures of all symptoms, errors, or messages.

b.  Capture any logs or data relevant to the issue.

c.  Contact IBM® to open a case.

   -For electronic support, visit the IBM Support Community:
     https://www.ibm.com/mysupport
   -If you require telephone support, visit this web page:
      https://www.ibm.com/planetwide/

d.  Provide a detailed description of the issue and reference this technote.

e.  Upload all of the details and data to the case.

   -You can attach files to the case in the IBM Support Community, or
   -Upload data to IBM test case server analysis at this URL:

    http://www.ibm.com/support/docview.wss?uid=ibm10733581

f.  Click here to submit feedback for this document.

Document Location

Worldwide

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Document Information

Modified date:
23 February 2021

UID

ibm16416773

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