Проект OpenNet: MAN cachefsstat (1) Команды и прикладные программы пользовательского уровня (FreeBSD и Linux)

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cachefsstat (1)

>> cachefsstat (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )

NAME

cachefsstat - Cache File
System statistics

SYNOPSIS

/usr/bin/cachefsstat [-z] [path]...

DESCRIPTION

The cachefsstat command displays statistical information about the cache file system mounted on path. The statistical information includes cache hits and misses, consistency checking, and modification operations. If path is not specified, all mounted cache file systems are used.

cachefsstat can also be used to reinitialize this information (see -z option).

The statistical information has the following format:

<cache hit rate>
<consistency checks>
<modifies>

where:

hit rate

: The percentage of cache hits over the total number of attempts, followed by the actual numbers of hits and misses.

consistency checks

: The number of consistency checks performed, followed by the number that passed, and the number that failed.

modifies

: The number of modify operations, including writes, creates, etc.

OPTIONS

The following option is supported:

-z

: Zero (reinitialize) statistics. Execute cachefsstat -z before executing cachefsstat again to gather statistics on the cache performance. This option can only be use by the superuser. The statistics printed reflect those just before the statistics are reinitialized.

USAGE

See largefile(5) for the description of the behavior of cachefsstat when encountering files greater than or equal to 2 Gbyte (2^31 bytes).

EXAMPLES

Example 1 Using cachefsstat

The following example shows the cachefsstat command run on file system /test:

example# cachefsstat /test
 /test
      cache hit rate:      100% (0 hits, 0 misses)
      consistency checks:    0  (0 pass, 0 fail)
      modifies:              0
garbage collection:           0