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Tuning I/O resources

Viewing namei cache activity

The effectiveness of the system's namei caches can be seen using sar -n:

   23:59:44  c_hits cmisses (hit %)
   23:59:49     869       0  (100%)
   23:59:54    1091       6  ( 99%)
   23:59:59     832       0  (100%)
   

Average 931 2 (100%)

c_hits indicates the number of pathname components that were found in the namei cache.

cmisses indicates the number of pathname components that were not found in the namei cache and subsequently required that the information be read from one of the disk drives.

hit % gives the percentage of the total number of pathname components referenced that were found in the namei cache.

See ``Reducing disk I/O by increasing the size of the namei cache'' for more information about tuning the namei cache.


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© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003