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тАО11-23-2004 01:06 AM
тАО11-23-2004 01:06 AM
After a memory upgrade from 128 to 512 on our vax 6000-510 with vms6.2, Autogen refuses to put Balsetcnt to the value indicated in modparams.dat. It lowered Balsetcnt saying that the value in modparams.dat could lead to an unbootable server.
With that low value we now haven't got enough slot and the server does a lot of swap.
I know that there is a relation beetween Vitualpagecnt, Wsmax and Balsetcnt. I think that I need to lower Virtualpagecnt and Wsmaw in order to get enough slot.
How I can estimate the value of these parameters to put them in the modparams and run again Autogen to get an acceptable value for Balsetcnt?
Regards
Steph.
Solved! Go to Solution.
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тАО11-23-2004 01:49 AM
тАО11-23-2004 01:49 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
up until (including) VMS V6, Virtualpagecnt and Balsetcnt were mapped to the same longword, with 28 bits (I believe it was) available for both together.
Starting from V7 they are uncoupled, so maybe you ARE due for an upgrade!
The best you can do under V6 is to have both at a value of 2^x -1 & 2^y - 1, with x+y = 28.
-- If my memory is not exactly correct on the 28 bits, I am sure John will kick in with the correction!
Cheers.
Have one on me.
Jan
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тАО11-23-2004 02:28 AM
тАО11-23-2004 02:28 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
1) did you increase the value ?
2) you may consider using virtual balance
set slots :
[OpenVMS VAX V6.0/NF] V6.0 New Features Table Of Contents and Preface
4.12 Virtual Balance Slots......................... 4-15
hth,
/HF
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тАО11-23-2004 02:31 AM
тАО11-23-2004 02:31 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
1.1.2.4 Virtual Balance Slots (VBS)
VBS provides a mechanism that gives the appearance of a virtually
unlimited quantity of balance slots by timesharing the set of
memory-resident processes through the limited set of real balance
slots. This new feature will particularly benefit systems that
have a large number of processes resident in memory, either
because of a large number of users (for example, ALL-IN-1), or
because of a large number of processes per user (for example,
Xterminals running DECwindows Motif[R]).
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тАО11-23-2004 02:34 AM
тАО11-23-2004 02:34 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
http://h18000.www1.hp.com/support/asktima/operating_systems/CHAMP_SRC940831002547.html
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тАО11-23-2004 03:46 AM
тАО11-23-2004 03:46 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
virtualpagecnt from 300000 to 1056576
wsmax from 28700 to 53200
Balsetcnt was lowered to 207 and I would like to get 260.
virtualpagecnt seems to be to high
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тАО11-23-2004 04:00 AM
тАО11-23-2004 04:00 AM
Solutionyou can add a max_virtualpagecnt=300000 in
modparams.dat and reexecute AUTOGEN.
If you need more processes with more virtual
space for each, you can enable
virtual balance set slots.
Here an output on a VAX with Virtual Balance Set Slots enabled :
System Memory Resources on 23-NOV-2004 17:56:28.88
Slot Usage (slots): Total Free Resident Swapped
Process Entry Slots 280 0 280 0
Balance Set Slots 150 0 150 0
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тАО11-23-2004 04:01 AM
тАО11-23-2004 04:01 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
Purely Personal Opinion
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тАО11-24-2004 03:07 AM
тАО11-24-2004 03:07 AM
Re: Balsetcnt, Wsmax et Virtualpagecnt after memory upgrade
Now I get the attented value for Balsetcnt.
Thanks all
Steph