Excessive activity to /proc can have negative performance impact on system.

(Doc ID 2415172.1)

Last updated on JULY 02, 2018

Applies to:

Solaris Operating System - Version 10 1/13 U11 to 11.3 [Release 10.0 to 11.0]
Information in this document applies to any platform.

Symptoms

Massive amount of accesses to /proc can lead to significant performance impact on the Solaris OS.

If the customer has a large number of processes accessing /proc at the same time, it can  have a noticeable performance impact on the system. This impact will manifest itself in many ways, some are

1) Unable to login to the system
2) Processes taking a long time to be created or exit.
3) Slow down in overall performance of the system.
4) Extreme slowness in various process monitoring commands (ps, prstat etc).
5) Lockstats taking a long time to start.



Cause

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