Cache Counters

NCache publishes different counters for monitoring purposes. It published its performance counters through PerfMon. It also publishes some counters for debugging purposes. You can monitor NCache counters for a specific cache on any Windows machine using both Windows PerfMon tool and monitor.

Performance Counters

NCache is not only enriched with powerful monitoring facilities, but besides that; it also provides different categories of counters for Windows performance monitor. This lets the clients monitor the overall performance of NCache. These categories include cluster, client, server and bridge. They cover all aspects of NCache monitoring including remote clients, cache clients, clustered operations, server counters, bridge queue status counters and many more.

Performance counters provide valuable information about system hardware, services, networks and applications that can be used to determine their performance. It helps in diagnosing problems, used to fine-tune systems and applications, monitoring real-time application performance and resolving bottleneck cause of system components.

Performance counters can be seen both from PerfMon and NCache Monitor. The statistics view is also used to see the performance statistics of a cache or a cluster.

These counters include:

Counters	Description
Fetches/sec	Number of Get operations per second.
Hits/sec	Number of successful Get operations per second.
Misses/sec	Number of failed Get operations per second.
Additions/sec	Number of Add operations per second.
Updates/sec	Number of Insert operations per second.
Deletes/sec	Number of Remove operations per second.
Expirations/sec	Number of items being expired currently per second.
Evictions/sec	Number of items evicted per second.
Data Bal/sec	Number of items this node is either reading from other nodes or sending to other nodes during a Data Load Balancing mode.
Mirror Queue Size	Number of items in the Mirror queue.
Average sec/fetch	Average time in seconds taken to complete one fetch operation.
Average sec/add	Average time in seconds taken to complete one Add operation.
Average sec/insert	Average time in seconds taken to complete one insert operation.
Average sec/remove	Average time in seconds taken to complete one remove operation.
Average sec/cache operation	Average time, in seconds, taken to complete one cache operation.
Client Request/sec	Number of requests sent by all clients to the cache server.
Client Response/sec	Number of responses received by all clients from the cache server.
Clustered opsrecv/sec	Number of clustered operations performed per second.
Clustered opsent/sec	Number of clustered operations performed per second.
Count	Number of items in the cache.
DispatchEnter/sec	Number of clustered operations performed per second.
Mirror queue size	Number of items in the Mirror queue.
Misses/sec	Number of failed Get operations per second.
Readthru/sec	Number of Read-through operations per second.
Response sent/sec	Number of clustered operations performed per second.
Responses/sec	Number of responses sent (meaning cache response for commands like add, get, insert, remove etc.) to all clients by this cache server.
State transfer/sec	Number of items this node is either reading from other nodes or sending to other nodes during a state transfer mode.
Writethru/sec	Number of Write-through/Write-behind operations per second.
CacheLastAccessCount	Number of items which are older than the access interval specified in the config.
Cluster ops/sec	Number of clustered operations performed per second.
Bytes sent/sec	How much data is sent from this node to other nodes in the cache.
Bytes received/sec	How much data is received by this node from other nodes in the cache.
Requests/sec	Number of requests (meaning cache commands like add, get, insert, remove etc.) being processed from all clients by this cache server.
Client bytes sent/sec	Bytes being sent from cache server to all its clients.
Client bytes received/sec	Bytes being received by cache server from all its clients.
Response Queue Count	Number of items in response queue; all responses are queued in the response queue before being sent.
Response Queue Size	Size of the response queue in bytes. Is displays the total data size of all the responses in the response queue.
Event Queue Count	Number of events in the event queue.
Events Processed/sec	Number of events processed per second on a client.
Events Triggered/sec	Number of events triggered and received by client per second.
Average ms/event	Average time taken by client to process a single event.
MapReduce Running Tasks	Number of tasks are in execution state at a time.
MapReduce Waiting Tasks	Number of tasks in waiting state when the maximum running tasks limit for execution has been reached.
MapReduce Mapped/sec	Number of keys mapped per second in running tasks.
MapReduce Reduced/sec	Number of keys reduced per second in running tasks.
MapReduce Combined/sec	Number of keys combined per second in running tasks.
Average µs/addBulk	Average Number of bulk (not independent keys) adds per microsecond. This applies to Bulk, Group and Tag APIs.
Average µs/fetchBulk	Average Number of bulk (not independent keys) fetches per microsecond. This applies to Bulk, Group and Tag APIs.
Average µs/removeBulk	Average Number of bulk (not independent keys) removes per microsecond. This applies to Bulk, Group and Tag APIs.
Average µs/insertBulk	Average Number of bulk (not independent keys) inserts per microsecond. This applies to Bulk, Group and Tag APIs.

Debugging Counters

Counter	Description
Socket send time (ms)	Time in milliseconds taken to send a request.
Socket send size (bytes)	Bytes sent per second.
Socket recv time (ms)	Time in milliseconds taken to receive a request.
Socket recv size (bytes)	Bytes received per second.
Nagling msg count	How many messages were sent together in socket.send.
TcpUpQueueCount	Number of items in TCP up queue.
TcpDownQueueCount	Number of items in TCP down queue.
BCastQueueCount	Number of items in BCast Queue.
MCastQueueCount	Number of items in MCast Queue.