How to set Buffer Cache on HP9000/s800

How to set Buffer Cache on HP9000/s800

Post by Robert C Stee » Sun, 20 Feb 1994 23:14:18



On my machine I need to set the buffer cache to 64Megs.  When I look at
the kernal parameters BUFPAGES and NBUF they are both set to zero and therefore
the buffer cache defaults to 10% of total memory.

While reading up on the buffer cache it says that it should be set by modifing
BUFPAGES and this will automatically set NBUF. Is this correct? Or do I
need to set both parameters?

What is the value I should enter in BUFPAGES to get a 64Meg cache? And
whay value should I enter for NBUF?

Any help would be appreciated.

Thanks

Rob.

 
 
 

How to set Buffer Cache on HP9000/s800

Post by Jeff Engli » Fri, 25 Feb 1994 06:14:24


: What is the value I should enter in BUFPAGES to get a 64Meg cache? And
: whay value should I enter for NBUF?
Hi Rob,

According to the HP-UX manuals on the series 800 you shoud set bufpages to
the number of pages you want buffer cache to be. Since the page size on all
800/700 machines (running 9.X or greater) is 4k, set bufpages to (64/4=16)
16000 and this should give you around 64M of buffer cache.

--

                                        Hope this helps,
                                        Jeff
--
Jeff English  ; Performance Specialist ; Hewlett Packard ; 19091 Pruneridge Ave

--

 
 
 

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