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11.31 - filecache_max/min kernel parms

SYSTEM ADMINISTRATION_1
Occasional Advisor

11.31 - filecache_max/min kernel parms

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
8 REPLIES
SYSTEM ADMINISTRATION_1
Occasional Advisor

Re: 11.31 - filecache_max/min kernel parms

(instead of "man pages" = that should say "documentation") :)
Shoghi Martinez G.
Honored Contributor

Re: 11.31 - filecache_max/min kernel parms

SYSTEM ADMINISTRATION_1
Occasional Advisor

Re: 11.31 - filecache_max/min kernel parms

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
Shoghi Martinez G.
Honored Contributor

Re: 11.31 - filecache_max/min kernel parms

Dennis Handly
Acclaimed Contributor

Re: 11.31 - filecache_max/min kernel parms

>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
sujit kumar singh
Honored Contributor

Re: 11.31 - filecache_max/min kernel parms

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
SYSTEM ADMINISTRATION_1
Occasional Advisor

Re: 11.31 - filecache_max/min kernel parms

thanks to last 2 posters - good info and has answered my questions
Pete Randall
Outstanding Contributor

Re: 11.31 - filecache_max/min kernel parms

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

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


Pete

Pete