14 March 2024

Viewing Space Statistics

You can use any of the administration tools to view operations statistics for a Space Where GigaSpaces data is stored. It is the logical cache that holds data objects in memory and might also hold them in layered in tiering. Data is hosted from multiple SoRs, consolidated as a unified data model.. If you have a system with MemoryXtend Related to Data Tiering. The MemoryXtend (blobstore) storage model allows an external storage medium (one that does not reside on the JVM heap) to store the GigaSpaces Space data and is designed for operational workloads. It keeps all indexes in RAM for better performance., you can access cache and blobstore metrics via the Admin API, and you can view these statistics in the Web Management Console.

Statistics for Space operations

Command:

gs.{sh/bat} space info --operation-stats <name>

Description:

This command lists the statistics for Space operations: object count, write/read/take/execute count, etc.

Input Example:

<GS_HOME>/bin/gs space info --operation-stats mySpace

<GS_HOME>/bin/gs.sh space info --operation-stats mySpace

Output Example:

Parameters and Options:

Item	Name	Description
Parameter	name	Provide the name of the Space for which you want to display the operation statistics.

Statistics for Space instance operations

Command:

gs.{sh/bat} space info-instance --operation-stats <instance ID>

Description:

This command lists the statistics for Space instance operations: object count, write/read/take/execute count, etc.

Input Example:

<GS_HOME>/bin/gs space info-instance --operation-stats mySpace~1_2

<GS_HOME>/bin/gs.sh space info-instance --operation-stats mySpace~1_2

Output Example:

Parameters and Options:

Item	Name	Description
Parameter	instance ID	Provide the instance ID of the Space instance for which you want to display the operation statistics.

Statistics for Space operations

Path

GET /spaces/{id}/statistics/operations

Description:

This option lists the statistics for Space operations: object count, write/read/take/execute count, etc.

Example Request:

curl -X GET --header 'Accept: application/json' 'http://localhost:8090/v2/spaces/alertSpace/statistics/operations'

Example Response:

{
  "size": 1,
  "timestamp": 1521368755460,
  "writeCount": 0,
  "writePerSecond": 0.00026335180482892404,
  "readCount": 0,
  "readPerSecond": 0.0005267036096578481,
  "takeCount": 0,
  "takePerSecond": 0.0005267036096578481,
  "updateCount": 0,
  "updatePerSecond": 0.00026335180482892404,
  "changeCount": 0,
  "changePerSecond": 0,
  "notifyRegistrationCount": 0,
  "notifyRegistrationPerSecond": 0.00026335180482892404,
  "notifyTriggerCount": 0,
  "notifyTriggerPerSecond": 0.00026335180482892404,
  "notifyAckCount": 0,
  "notifyAckPerSecond": 0.00026335180482892404,
  "executeCount": 0,
  "executesPerSecond": 0.00026335180482892404,
  "objectCount": 0,
  "notifyTemplateCount": 0,
  "activeConnectionCount": 0,
  "activeTransactionCount": 0
}
}

Options:

Option	Description	Required
space name	Provide the name of the Space for which you want to see the operation statistics.	Yes

Statistics for Space instance operations

Path

GET /spaces/{id}/instances/{instanceId}/statistics/operations

Description:

This option lists the statistics for Space instance operations: object count, write/read/take/execute count, etc.

Example Request:

curl -X GET --header 'Accept: application/json' 'http://localhost:8090/v2/spaces/alertSpace/instances/alertSpace~1/statistics/operations'

Example Response:

{
  "adminTimestamp": 1521368888174,
  "timestamp": 1521368888174,
  "writeCount": 0,
  "writePerSecond": 0,
  "readCount": 0,
  "readPerSecond": 0,
  "takeCount": 0,
  "takePerSecond": 0,
  "updateCount": 0,
  "updatePerSecond": 0,
  "changeCount": 0,
  "changePerSecond": 0,
  "notifyRegistrationCount": 0,
  "notifyRegistrationPerSecond": 0,
  "notifyTriggerCount": 0,
  "notifyTriggerPerSecond": 0,
  "notifyAckCount": 0,
  "notifyAckPerSecond": 0,
  "executeCount": 0,
  "executesPerSecond": 0,
  "objectCount": 0,
  "notifyTemplateCount": 0,
  "activeConnectionCount": 0,
  "activeTransactionCount": 0
}

Options:

Option	Description	Required
space name	Provide the name of the Space instance for which you want to see the operation statistics.	Yes
instanceId	Provide the instance ID of the Space instance for which you want to see the operation statistics.	Yes

In the Web Management Console, you can view general operation statistics for a Space. If you have a system with MemoryXtend, you can also view cache and blobstore statistics.

To view operation statistics:

In the Spaces view, highlight the Space or the Space instance you want to investigate.
Click Statistics in the upper row of options, and then click Operations to display the operation statistics pane in the lower area of the view.
The throughput statistics timeline only shows information that is collected in real time. Click Stop to stop it, and Start to start it running again.
To see the exact value of a specific operation for a specific point in time, hover the mouse over the graph for that time. The information is displayed in a tooltip.
The Operations Count graph displays a rough estimate of the number of various operations to the Space (or Space instance). To see the exact number of a particular operation, hover the mouse over the relevant graph bar. The exact number of operations is shown in a tooltip.

The operation statistics function doesn’t save past events. If you stop the timeline for a length of time, you will lose the statistics that might have been gathered during that time. When you start the timeline again, it jumps to the current time.

To view MemoryXtend statistics:

In the Spaces view, double-click the MemoryXtend Space instance for which you want to view statistics. This will drill through to the page that provides access to the Space instance details.
Click Statistics in the upper row of options, and then click MemoryXtend to display the MemoryXtend statistics for the Space instance.

The following statistics are displayed for off-heap storage:

Item	Description
Used Cache Size	Amount of off-heap cache memory currently being used, in MB.
Cache Miss	How many times the data queried was retrieved from the off-heap cache.
Cache Hit	How many times the data queried was retrieved from the on-heap storage.
Hot Data Cache Miss	How many times the data queried was retrieved from the off-heap cache because the on-heap storage was full.
Used Off-Heap Cache	Amount of off-heap memory currently being used, in MB and as a percentage of the total memory allocated for the blobstore.

The following statistics are displayed for disk storage:

Item	Description
MemTable Hits	Number of MemTable hits.
MemTable Misses	Number of MemTable misses (data was not present in the MemTable).
Get Queries Served by L0	Number of Get queries that were served by the L0 layer of the RocksDB.
Get Queries Served by L1	Number of Get queries that were service by the L1 layer of the RocksDB.
Get Queries Served by L2 and Up	Number of queries that were served by the L2 layer or deeper of the RocksDB.
Keys Written	Number of keys that were written to the RocksDB.
Keys Read	Number of keys that were read from the RocksDB.
Keys Updated	(If in-place update is enabled) Number of keys that were updated in the RocksDB.
Bytes Sent	Number of uncompressed bytes issued by the following RocksDB operations: Put, Delete, Merge, Write.
Bytes Received via Get	Number of uncompressed bytes read from the RocksDB Get operation.
Bytes Received via Iterator	Number of uncompressed bytes read from an iterator (initial load).
MultiGet Calls	Number of MultiGet calls.
Keys Read via MultiGet	Number of keys read via MultiGet calls.
Bytes Received via MultiGet	Number of bytes received via MultiGet calls.

Refer to the Admin API topics in the Developer Guide.