STRMSGSZ kernel parameter

[Timo Ruiter]

Hi all,

Can anybody tell me in what way the system will behave differently when I set the value of STRMSGSZ to 4096 instead of the default value of 0?

Thanks,
Timo

[James R. Ferguson]

Hi:

STRMSGSZ when set to zero means that no limit to the number of data bytes in a streams message. Setting the value to 4096 would mean that messages could be segmented and therefore network performance possibly degraded.

Unless you have a compelling desire to change this value, I'd leave it set to its default which is zero.

Regards!

...JRF...

[Sajid_1]

Normally the default '0' value indicates 'no limit'. That parameter value can go up to any level without limitation. But when you set a specific value say 4096 to the parameter, then you are limiting it to 4096.

Read more about STRMSGSZ here:
http://www.docs.hp.com/cgi-bin/otsearch/getfile?id=/hpux/onlinedocs/939/KCParms/KCparam.StrMsgSz.html&searchterms=strmsgsz&queryid=20020903-085506

[S.K. Chan]

From my experience, I've had the ncs broker daemon failed on me. The error message was not apparent but I realized by changing STRMSGSZ back to 0, the problem was resolved. Behavior of the system will not change but you'll see some "side-effects" especially on processes/daemons which depend on the kernel parameter for them to work properly.