This dashboard provides an interface to view and analyze metrics from your Apache Cassandra databases.
| Metric visualization | Metric name | Description |
|---|---|---|
| Client Read Average Duration | cassandra_ClientRequest_Latency_Mean | Mean of read operations since server start. |
| Client Write Average Duration | cassandra_ClientRequest_Latency_Mean | Mean of write operations since server start. |
| Pending Compactions | cassandra_Compaction_PendingTasks_Value | Total value of compaction tasks in the queue |
| Thread Pool Blocked Task | cassandra_ThreadPools_CurrentlyBlockedTasks_Count | Tasks that are currently blocked from processing |
| JVM Heap Usage | java_Memory_HeapMemoryUsage_used, java_Memory_HeapMemoryUsage_max | Heap memory used in relation to the maximum heap memory. |
| Unavailable Exceptions | cassandra_ClientRequest_Unavailables_Count | Requests for which the required nodes were unavailable |
| Read Requests | cassandra_ClientRequest_Latency_Count | Read response time. |
| Write Requests | cassandra_ClientRequest_Latency_Count | Write response time. |
| Read Latency (99th%) | cassandra_ClientRequest_Latency_99thPercentile | 99th percentile of Cassandra transactional read latency |
| Write Latency (99th%) | cassandra_ClientRequest_Latency_99thPercentile | 99th percentile of Cassandra transactional write latency |
| Cache Hit Rate | cassandra_Cache_HitRate_Value | Rate of the number of cache hits to the number of lookups |
| Occupied Cache Size | cassandra_Cache_Size_Value | Total size of occupied cache |
| Pending Compactions Tasks | cassandra_Compaction_PendingTasks_Value | Number of compactions tasks in the queue. |
| Completed Compactions Tasks | cassandra_Compaction_CompletedTasks_Value | Number of compactions tasks completed. |
| Bytes Compacted | cassandra_Compaction_BytesCompacted_Count | Total number of bytes compacted since server [re]start. |
| SSTable Accessed Per Read | cassandra_ColumnFamily_SSTablesPerReadHistogram_99thPercentile | 99th percentile of the Histogram of the number of sstable data files accessed per single partition read |
| Disk Usage | cassandra_ColumnFamily_LiveDiskSpaceUsed_Count | Live disk space used. |
| Top 5 Size Tables | cassandra_Storage_Load_Count | Top 5 size tables for the Storage used for Cassandra data in bytes |
| Total Disk Usage | cassandra_Storage_Load_Count | Total disk usage for the Storage used for Cassandra data in bytes |
| Number Of Active Tasks | cassandra_ThreadPools_ActiveTasks_Value | Current number of active tasks |
| Number Of Completed Tasks | cassandra_ThreadPools_CompletedTasks_Value | Total number of completed tasks |
| Number Of Tasks That Were Blocked | cassandra_ThreadPools_TotalBlockedTasks_Count | Total number of blocked tasks |
| Pending Tasks | cassandra_ThreadPools_PendingTasks_Value | Total number of pending tasks |
| Currently Blocked Tasks | cassandra_ThreadPools_CurrentlyBlockedTasks_Count | Current number of blocked tasks |
| Heap Memory Used | java_Memory_HeapMemoryUsage_used | Volume of heap memory used |
| Non-Heap Memory Used | java_Memory_NonHeapMemoryUsage_used | Volume of non-heap memory used |
| Garbage Collection Time | java_GarbageCollector_ParNew_CollectionTime, java_GarbageCollector_ConcurrentMarkSweep_CollectionTime | Amount of time spent garbage collecting |
| Garbage Collections | java_GarbageCollector_ParNew_CollectionCount, java_GarbageCollector_ConcurrentMarkSweep_CollectionCount | Total number of garbage collection events |
| Exceptions Count | cassandra_ClientRequest_Timeouts_Count, cassandra_ClientRequest_Unavailables_Count, cassandra_ClientRequest_Failures_Count | Number of request timeouts, request being unavailable and request failures. |
| Unavailable Exceptions Count | cassandra_ClientRequest_Unavailables_Count | Number of times when a request is unavailable. |
| Timeout Exceptions Count | cassandra_ClientRequest_Timeouts_Count | Number of times there is a request timeout. |
| Transaction Failures Exceptions Count | cassandra_ClientRequest_Failures_Count | Number of times there is a request failure. |
| Storage Exceptions Count | cassandra_Storage_Exceptions_Count | Number of unhandled exceptions. |