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Chapter 7: Caching
Read Hit Ratio: 82
Write Hit Ratio: 74
Prct Dirty Cache Pages = 63
Prct Cache Pages Owned = 50
Prct Read Flushes = 10
Prct Write Flushes = 12
Table 7-1 summarizes entries in the raid5 getcache output.
Table 7-1
Output of raid5 getcache
Entry
Meaning
Usable Cache
Size of cache in megabytes to use for caching, not greater
than the SP memory size as displayed by raid5 getagent
(see “getagent,” in Appendix B). Valid values are 0, 8,
and 64. Defaults are
0
(user has selected to disable the
cache) and
8
(user has selected to enable the cache).
The CLI does not let you specify more memory than you
have. If you specify less than you have, the remaining
memory is unused.
Page Size
User-specified page size in KB for caching; for example,
2 means a 2 KB page size.
Cache State
Enabled: SP is fully functional.
Disabled: SP not capable of or configured for caching.
Synching: SP is synchronizing its cache with the peer SP.
Enabling: cache is in the process of becoming enabled.
Quiescing: cache was enabled but system experienced a
fault or was disabled by user. The system is now
finishing processing outstanding I/O before saving the
contents of the cache.
Frozen: SP has finished quiescing and is now waiting for
peer SP to finish quiescing or dumping.
Dumping: SP is in the process of dumping contents of
the cache to a private location on the disk.
Initing: the SP is initializing.
