🚀 go-pugleaf

In article <01GRDFI4HY2A8WVZBS@MONMOUTH-etdl1.Army.MIL>, Brian J. Schenkenberger, VAXman writes:
> I've never done this but... I can offer you a quick method to change
> the value.
> 
> The value for WSMAX is stored at the symbolic address SGN$GL_MAXWSCNT.
> You can change this value WHILE THE SYSTEM IS RUNNING with DELTA.  How?
> Lookup the address of SGN$GL_MAXWSCNT in SYS.MAP.  Then, enter DELTA.
> 
> $ RUN SYS$SHARE:DELTA
> 1:m <cr>
> 00000001 <cr>
> 00010001:<address of SGN$GL_MAXWSCNT>/<return-curr-value> <your-new-value>
> EXIT                                                       (hex of course)
> $
> 
>>Caveats ? :-)
> 
> This above will change the value.  Its implications if you increase it
> above the current limits? I know not!  I just LOWERed my system's WSMAX
> by 16 with the above and have had no problems.
> 
You should have no problems if you LOWER the value of WSMAX this way, but you
WILL have some if you RAISE it.  WSMAX is a parameter that is used to calculate
the size of a balance set slot (which is done early in the boot process).  If
you raise the value of WSMAX beyond the value it had at system startup the
system will overwrite the head of one balance slot when it is trying to use the
tail of the previous one, thus corrupting the PHD of a resident process, which
will shortly cause a crash or hang of the entire system.


-- 
Mike Jacobi
NAVSSES VAXCluster system manager
System@Eagle.Navsses.Navy.Mil
System@Condor.Navsses.Navy.Mil

Disclaimer - I speak for myself.  No-one else.