topic 11.31 - filecache_max/min kernel parms in Operating System - HP-UX

11.31 - filecache_max/min kernel parms

SYSTEM ADMINISTRATION_1 — Tue, 10 Feb 2009 21:12:37 GMT

hello -
1. we are using 11.23 and i'm researching some 11.31 params. do the filecache_ parms w/ 11.31 replace the dbc__pct parms from 11.23?

as i understand it these filecache_ parms are new w/ 11.31...

2. also, could someone give me a description of what the "base_pagesize" 11.31 parm does? (i can't find that in the man pages)

thanks

Re: 11.31 - filecache_max/min kernel parms

SYSTEM ADMINISTRATION_1 — Tue, 10 Feb 2009 21:15:35 GMT

(instead of "man pages" = that should say "documentation") :)

Re: 11.31 - filecache_max/min kernel parms

Shoghi Martinez G. — Tue, 10 Feb 2009 21:16:02 GMT

base_pagesize:
http://docs.hp.com/en/14670/ENW-TBPS-TW.pdf

Re: 11.31 - filecache_max/min kernel parms

SYSTEM ADMINISTRATION_1 — Tue, 10 Feb 2009 21:27:50 GMT

thanks shoghi - can you also give me a link where more of this type documentation is available (i.e. index to all tunable params) - had no idea they had papers for every kernel param

Re: 11.31 - filecache_max/min kernel parms

Shoghi Martinez G. — Tue, 10 Feb 2009 21:33:44 GMT

Enjoy:
http://docs.hp.com/en/TKP-90203/index.html

Re: 11.31 - filecache_max/min kernel parms

Dennis Handly — Tue, 10 Feb 2009 21:43:45 GMT

>had no idea they had papers for every kernel param

There are man pages for lots of them:
http://docs.hp.com/en/B2355-60130/filecache_max.5.html
http://docs.hp.com/en/B2355-60130/filecache_max.5.html

Re: 11.31 - filecache_max/min kernel parms

sujit kumar singh — Wed, 11 Feb 2009 06:21:15 GMT

hi

h20338.www2.hp.com/hpux11i/downloads/Unifiedfilecache.pdf --- slide no. 17

http://docs.hp.com/en/B2355-60130/dbc_max_pct.5.html --- see the description

These tunables should not be modified. Attempting to tune any of the obsolete buffer cache tunables, bufcache_max_pct, bufpages, dbc_min_pct, dbc_max_pct, or nbuf results in an error.

Use the tunables filecache_max and filecache_min to set limits on the file cache. Note that, on a any given system, the optimum values of these two new tunables are not necessarily equivalent to the optimum values of the obsolete buffer cache tunable values in the older systems. You should first determine if the new default values yield acceptable performance on your system, before attempting to change the values of the new file cache tunables

also find the release notes for hp-ux 11iv3 for HP9000 and HP Integrity servers found at this link

http://docs.hp.com/en/5991-6469/5991-6469.pdf -- apge 210

and here is the "basepage_size"

http://docs.hp.com/en/14670/ENW-TBPS-TW.pdf

regards
sujit

Re: 11.31 - filecache_max/min kernel parms

SYSTEM ADMINISTRATION_1 — Wed, 11 Feb 2009 15:18:12 GMT

thanks to last 2 posters - good info and has answered my questions

Re: 11.31 - filecache_max/min kernel parms

Pete Randall — Wed, 11 Feb 2009 15:21:47 GMT

> thanks to last 2 posters - good info and has answered my questions

So you give them a lousy 2 and 4 points??!!??

Pete