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Distributed Cache Counters

NCache provides various cache server counters to monitor the performance of cache servers. You can monitor all these counters for a specific cache on any Windows machine using either NCache Web Monitor or PerfMon tool.

These counters include:

Counters Description
# Clients Number of connected clients to an instance of cache.
Fetches/sec Number of Get operations per second.
Hits/sec Number of successful Get operations per second.
Hits ratio/sec Ratio of number of successful Get operations per second and total number of 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 Balance/sec Number of items this node is either reading from other nodes or sending to other nodes during a Data Load Balancing mode.
Datasource Failed operations/sec
(Enterprise edition only)
Number of datasource write operations failed per second. Write operations performed on datasource provider returning Failure/FailureRetry/FailureDontRemove as status of OperationResult are counted.
Datasource updates/sec
(Enterprise edition only)
Number of update operations per second in cache after datasource write operations.
Counter Count
(Enterprise edition only)
Number of Counters in the cache.
Counter Size
(Enterprise edition only)
Size of the Counters in cache in bytes, including cache store meta info and all other indices.
Dictionary Count
(Enterprise edition only)
Number of dictionaries in the cache.
Dictionary Size
(Enterprise edition only)
Size of the Dictionaries in cache in bytes, including cache store meta info and all other indices.
List Count
(Enterprise edition only)
Number of lists in the cache.
List Size
(Enterprise edition only)
Size of the Lists in cache in bytes, including cache store meta info and all other indices.
Queue Count
(Enterprise edition only)
Number of queries in the cache.
Queue Size
(Enterprise edition only)
Size of the Queues in cache in bytes, including cache store meta info and all other indices.
Set Count
(Enterprise edition only)
Number of sets in a cache.
Set Size
(Enterprise edition only)
Size of the Sets in cache in bytes, including cache store meta info and all other indices.
Average Query Size
(Enterprise edition only)
Average number of items returned by queries in a second.
Average us/fetch Average time (microseconds) taken to complete one Get operation.
Average us/add Average time (microseconds) taken to complete one Add operation.
Average us/insert Average time (microseconds) taken to complete one Insert operation.
Average us/remove Average time (microseconds) taken to complete one Remove operation.
Average us/cache operation Average time (microseconds) taken to complete one cache operation.
Average us/Bridge Operation
(Enterprise edition only)
Average time (microseconds) taken to complete one bridge operation.
Average us/datasource update
(Enterprise edition only)
Average time (microseconds) taken to complete one datasource update cache operation.
Average us/datasource write
(Enterprise edition only)
Average time (microseconds) taken to complete one datasource write operation. Datasource write operations include both write-thru and write-behind operations.
Cache Size Size of the cache in bytes, including cache store meta info and all other indices.
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.
Eviction Index Size Size of eviction indices in bytes, define on the cache.
Expiration Index Size Size of expiration indices in bytes, define on the cache.
General Notifications Queue Size Number of general notification events in queue.
Group Index Size
(Enterprise edition only)
Size of group and sub group indices in bytes defined on this cache.
Mirror queue size Number of items in the Mirror queue.
Query Index Size
(Enterprise edition only)
Size of query indices in bytes, defined on the cache.
Read-thru/sec
(Enterprise edition only)
Number of Read-through operations per second.
Request Log Ledger Size Total in-memory size of the log ledger, which stores logged requests.
Response sent/sec Number of clustered operations performed per second.
Responses/sec Number of responses sent (cache response for commands like add, get, insert, remove etc.) to all clients by this cache server.
Sliding Index queue size Number of items in the Sliding-Index queue.
Socket recv size (bytes) Data received in the last message.
Socket recv time (msec) Time it took to receive the last message.
Socket send size (bytes) Data that was sent in the last message.
Socket send time (msec) Time it took to send the last message over the socket.
State transfer/sec Number of items this node is either reading from other nodes or sending to other nodes during a state transfer mode.
Write-thru/sec
(Enterprise edition only)
Number of Write-through/Write-thru 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.
Bridge Queue Count
(Enterprise edition only)
Number of items in the bridge queue.
Bridge Queue Size
(Enterprise edition only)
Total size of bridge queue in bytes.
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 (cache commands like add, get, insert, remove etc.) being processed from all clients by this cache server.
Requests Logged/sec Average number of requests logged in a second.
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.
Queries/sec
(Enterprise edition only)
Number of queries executing per second on the cache.
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. It 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.
Logged Request Count Total number of currently logged requests.
MapReduce Running Tasks
(Enterprise edition only)
Number of MapReduce tasks running.
MapReduce Waiting Tasks
(Enterprise edition only)
Number of tasks in waiting state when the maximum running tasks limit for execution has been reached.
MapReduce Mapped/sec
(Enterprise edition only)
Number of keys mapped per second in running tasks.
MapReduce Reduced/sec
(Enterprise edition only)
Number of keys reduced per second in running tasks.
MapReduce Combined/sec
(Enterprise edition only)
Number of keys combined per second in running tasks.
Readers Count Number of running readers.
Average us/addBulk Average time (microseconds) taken to complete one AddBulk operation.
Average us/fetchBulk Average time (microseconds) taken to complete on GetBulk operation.
Average us/Query Execution (Enterprise edition only) Average time (microseconds) taken to execute one query.
Average us/removeBulk Average time (microseconds) taken to complete one RemoveBulk operation.
Average us/insertBulk Average time (microseconds) taken to complete one InsertBulk operation.
Average us/Read-Thru
(Enterprise edition only)
Average time (microseconds) taken to complete Read-thru operation.
Average us/Write-Thru
(Enterprise edition only)
Average time (microseconds) taken to complete write-thru operation.
Average us/Write-behind
(Enterprise edition only)
Average time (microseconds) taken to complete write-behind operation.
Write-behind/sec
(Enterprise edition only)
Number of Write-behind operations per second.
Write-behind evictions/sec
(Enterprise edition only)
Number of items evicted per second from write-behind queue. Only failed operation are evicted which are enqueued for operation retry.
Write-behind batch count
(Enterprise edition only)
Number of operations selected in current batch interval for execution. For write-behind, if batching is enabled, number of operations dequeued in current batch interval for execution is displayed by this counter.
Write-behind queue count
(Enterprise edition only)
Number of operations in Write-behind queue.
Write-behind failure retry count
(Enterprise edition only)
Number of operations failed enqueued for retry. Data source write operation returning FailureRetry as status are also enqueued for retry.
NaglingMsgCount Number of messages that are combined to be sent in Nagling process.
Bridge Operations Received
(Enterprise edition only)
Number of bridge operations received.
Bridge Operations Received/sec
(Enterprise edition only)
Number of bridge operations received per second.
Bridge Operations Sent
(Enterprise edition only)
Number of bridge operations sent.
Bridge Operations Sent/sec
(Enterprise edition only)
Number of bridge operations sent per second.
TcpUpQueueCount Number of items in TCP up-queue.
TcpDownQueueCount Number of items in TCP down-queue.
BcastQueueCount Number of items in BCast queue waiting to be processed in sequenece.
McastQueueCount Number of items in MCast queue waiting to be processed in sequenece.

See Also

NCache Counters
Cache Client Counters
Bridge Counters

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