getDbDiskCacheStats(jdo: JadeDynamicObject input);
The
The returned values are
The properties returned in the dynamic object are listed in the following table.
Property | Description |
---|---|
cacheMisses | The number of cache misses; that is, where the address referenced a block that was not found in the cache |
gets | The number of read requests received |
puts | The number of write requests received |
blockReads | The number of block reads from disk performed |
getsWithFetch | The number of read requests with additional block prefetch received |
putsWithFetch | The number of write requests with additional block prefetch received |
blocksFetched | The number of blocks prefetched with read from disk |
blockReadsMultiple | The number of prefetch reads performed |
bufferReassigns | The number of times buffers were reassigned for use with a different address |
bufferSteals | The number of times the buffer reassigned was dirty, requiring writing |
maxHashCollisions | The maximum number of hash collisions |
maxConcFlushIos | The maximum number of concurrent flush write operations |
blockWrites | The number of single block writes to disk performed |
blockWritesMultiple | The number of multiple block writes to disk performed |
For further explanation of these values, refer to the JADE Monitor knowledge base.
Properties are added to the object when the method is first called. The object can then be used in subsequent calls. If the dynamic object passed to the method already contains properties that do not match the properties to be returned, the existing dynamic object properties are removed and replaced with the appropriate properties. This method is most efficient when the properties match those to be returned.
For an example of the use of and output from this method, see the