topic Physical Paging Memory in Operating System - HP-UX

Physical Paging Memory

Dan Carter_1 — Sat, 25 May 2002 22:58:39 GMT

Small assist would be appreciated. :) Below is the dmsg output of a K580 with 11.0 of a small test box.

Question, what is the kernel param to change the physical paging memory? And second, can someone tell me why it is no matter howmany nbuffs I increase it always wants more...more....more... :)

Thanks...
Dan Carter
System Console is on the ITE
btlan1: Initializing 10/100BASE-T card at 10/16/8.......
btlan1: Initializing 10/100BASE-T card at 10/4/8.......
btlan1: Cable not connected at card 10/4/8.
Logical volume 64, 0x3 configured as ROOT
Logical volume 64, 0x2 configured as SWAP
Logical volume 64, 0x2 configured as DUMP
Swap device table: (start & size given in 512-byte blocks)
entry 0 - major is 64, minor is 0x2; start = 0, size = 2097152
Dump device table: (start & size given in 1-Kbyte blocks)
entry 0 - major is 31, minor is 0x6000; start = 88928, size = 1048576
Starting the STREAMS daemons-phase 1
Create STCP device files
Starting the STREAMS daemons-phase 2
B2352B/9245XB HP-UX (B.11.00) #1: Thu Nov 6 01:58:21 PST 1997

Memory Information:
physical page size = 4096 bytes, logical page size = 4096 bytes
Physical: 1048560 Kbytes, lockable: 681084 Kbytes, available: 792544 Kbytes

Warning: 16000 nbuf requested, adjusted to 16040
Using 16040 buffers containing 128000 Kbytes of memory.

Re: Physical Paging Memory

James Murtagh — Sat, 25 May 2002 23:23:46 GMT

Hi,

What do you mean by the "Physical Paging Memory"? There are parameters lotsfree, desfree and minfree which determine when the system will start to swap, is that what you mean?

Also, looks like you have nbuf and bufpages both configured - nbuf should really be set to 0 and it is mainly there for compatibilty reasons. If you can specify what values these parameters are I could tell you conclusively what is happening.

Re: Physical Paging Memory

eran maor — Sun, 26 May 2002 07:32:48 GMT

Re: Physical Paging Memory

Steve Steel — Tue, 28 May 2002 13:09:07 GMT

Hi

try

http://www.docs.hp.com//hpux/onlinedocs/os/11.0/tuningwp.html

Steve Steel

Re: Physical Paging Memory

Dan Carter_1 — Tue, 28 May 2002 20:08:13 GMT

Ah....I guess this question was really 2.
nbuf = 0 allows totally dynamic allocation?
I'm tuning for the JVM (blah..blah..blah)
The problem we have going on is the java app is reporting insufficient nbuffers to our engineers.

The second question refered to the dmesg output I posted where it said physical memory page size - I was wondering if there was a way to actually increase it to 8k.

-Dan