To get MultiMap statistics, use the getLocalMultiMapStats() method from the MultiMap interface.
This method returns a LocalMultiMapStats object that holds local MultiMap statistics.
Below is example code where the getLocalMultiMapStats() method and the getLastUpdateTime method from LocalMultiMapStats get the last update time.
HazelcastInstance node = Hazelcast.newHazelcastInstance();
MultiMap<String, Customer> customers = node.getMultiMap( "customers" );
LocalMultiMapStats multiMapStatistics = customers.getLocalMultiMapStats();
System.out.println( "last update time = "
+ multiMapStatistics.getLastUpdateTime() );
Below is the list of metrics that you can access via the LocalMultiMapStats object.
/**
* Returns the number of entries owned by this member.
*/
long getOwnedEntryCount();
/**
* Returns the number of backup entries hold by this member.
*/
long getBackupEntryCount();
/**
* Returns the number of backups per entry.
*/
int getBackupCount();
/**
* Returns memory cost (number of bytes) of owned entries in this member.
*/
long getOwnedEntryMemoryCost();
/**
* Returns memory cost (number of bytes) of backup entries in this member.
*/
long getBackupEntryMemoryCost();
/**
* Returns the creation time of this map on this member.
*/
long getCreationTime();
/**
* Returns the last access (read) time of the locally owned entries.
*/
long getLastAccessTime();
/**
* Returns the last update time of the locally owned entries.
*/
long getLastUpdateTime();
/**
* Returns the number of hits (reads) of the locally owned entries.
*/
long getHits();
/**
* Returns the number of currently locked locally owned keys.
*/
long getLockedEntryCount();
/**
* Returns the number of entries that the member owns and are dirty (updated
* but not persisted yet).
* Dirty entry count is meaningful when a persistence is defined.
*/
long getDirtyEntryCount();
/**
* Returns the number of put operations.
*/
long getPutOperationCount();
/**
* Returns the number of get operations.
*/
long getGetOperationCount();
/**
* Returns the number of Remove operations.
*/
long getRemoveOperationCount();
/**
* Returns the total latency of put operations. To get the average latency,
* divide by the number of puts.
*/
long getTotalPutLatency();
/**
* Returns the total latency of get operations. To get the average latency,
* divide by the number of gets.
*/
long getTotalGetLatency();
/**
* Returns the total latency of remove operations. To get the average latency,
* divide by the number of gets.
*/
long getTotalRemoveLatency();
/**
* Returns the maximum latency of put operations. To get the average latency,
* divide by the number of puts.
*/
long getMaxPutLatency();
/**
* Returns the maximum latency of get operations. To get the average latency,
* divide by the number of gets.
*/
long getMaxGetLatency();
/**
* Returns the maximum latency of remove operations. To get the average latency,
* divide by the number of gets.
*/
long getMaxRemoveLatency();
/**
* Returns the number of Events Received.
*/
long getEventOperationCount();
/**
* Returns the total number of Other Operations.
*/
long getOtherOperationCount();
/**
* Returns the total number of total operations.
*/
long total();
/**
* Cost of map & Near Cache & backup in bytes.
* todo: in object mode, object size is zero.
*/
long getHeapCost();