How to tune NCALL (kernel callout table size) in SCO?

Posted on 2004-11-18
Last Modified: 2013-12-05
On our production SCO OpenServer 5.0.5 system, I see this console message every few days:
"CONFIG: timeout - Timeout table free list empty (min_free_callouts = 50 exceeded)".

According to an entry in, if I read it correctly, this indicates that the NCALL kernel parameter value should be increased. I've stepped through every area (performance and configuration tunables) available in scoadmin, but I don't see the NCALL parameter listed.

How do I update this value?

Question by:Geoff_Kovarik
    1 Comment
    LVL 38

    Accepted Solution

    NCALL is a kernel parameter that pertains to a release prior to SCO OpenServer 5 (SCO UNIX System V/386 Version 4.x). In SCO OpenServer 5, it has been replaced by MAXCALL. This parameter is not configurable. It has been set to a maximum of 5000, which is the maximum number of pending callouts.


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