hp-ux11.31 Filecache Parameters on the operating system: Filecache_max and Filecache_min

Default Value:
filecache_min-approximately 5% of physical memory
filecache_max-approximately 50% of physical memory

This parameter acts like Filesystemcache in the Aix operating system, and the following actions on the file system cause file system buffering to consume physical memory directly:

1.rman backup script Backup to file system, 2.EXPDP export to file system, 3.export export to file system, 4.ftp upload and download large files on HP-UX (or AIX).

Then someone might have a question: how do I see how much physical memory the file system buffers are currently occupying? The Hp-xu method is to use the glance command for the operating system:

Glance Enter

You can see it after you knock on M.

Therefore, in the high memory utilization on the HP-UX 11.31 due to parameter "Filecache_max" [ID 1264915.1] article, the direct recommendations are as follows:

Solutionreduce the value of Filecache_max into 5% to 10% of physical memory since Oracle database server have buffer cache Enabled. If there is and application running on the box, reduce the value of little by little to see if there are any performance pro Blem.

The recommendation is to set Filecache_max to 10%, which means that filecache consumes up to 10% of physical memory. However, in the actual engineering practice, can be set filecache_min=1%,filecache_max=1%.

Note that the above argument is the parameter in hp-ux11.31, and in 11.23, it is the following parameter to implement the Filecache function:dbc_max_pct and dbc_min_pct

/#kctune dbc_max_pcttunable      Value  Expression  changesdbc_max_pct      5  5           immed/#kctune dbc_ Min_pcttunable      Value  Expression  changesdbc_min_pct      1  1           immed

hp-ux11.31 Filecache Parameters on the operating system: Filecache_max and Filecache_min