Oracle 5.0, Справочное руководство

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Mysqlnd query result cache plugin (
mysqlnd_qc
)
2691
["length"]=>
int(11)
["type"]=>
int(3)
}
}
}
}
}
See Also
mysqlnd_qc_get_core_stats
20.7.7.7.4.
mysqlnd_qc_get_core_stats
Copyright 1997-2012 the PHP Documentation Group. [2230]
•
mysqlnd_qc_get_core_stats
Statistics collected by the core of the query cache
Description
array mysqlnd_qc_get_core_stats();
Returns an array of statistics collected by the core of the cache plugin. The same data fields will be
reported for any storage handler because the data is collected by the core.
The
PHP
configuration setting
mysqlnd_qc.collect_statistics
controls the collection of
statistics. The collection of statistics is disabled by default for performance reasons. Disabling the
collection of statistics will also disable the collection of time related statistics.
The
PHP
configuration setting
mysqlnd_qc.collect_time_statistics
controls the collection of
time related statistics.
The scope of the core statistics is the
PHP
process. Depending on your deployment model a
PHP
process may handle one or multiple requests.
Statistics are aggregated for all cache entries and all storage handler. It is not possible to tell how much
queries originating from
mysqli
,
PDO_MySQL
or
mysql
API calls have contributed to the aggregated
data values.
Parameters
This function has no parameters.
Return Values
Array of core statistics
Statistic Description Version
cache_hit
Statement is considered
cacheable and cached data
has been reused. Statement
is considered cacheable and
a cache miss happened but
the statement got cached by
someone else while we process
it and thus we can fetch the
result from the refreshed cache. Since 1.0.0.