通过本文您可以了解云数据库Cassandra的监控项。
当您调用云监控的API接口时，需要获取当前云产品的Namespace和Period，具体取值如下：
- Namespace为acs_cds。
- Period默认为60秒，也可以为60的整数倍。
当前云产品的MetricName和Dimensions的取值如下表所示。
| 监控项 | 单位 | MetricName | Dimensions | Statistics |
|---|---|---|---|---|
| AntiEntropy活跃任务数 | Counts | AntiEntropyActiveTasks | userId、clusterId、host | Average、Maximum、Minimum |
| AntiEntropy等待任务数 | Counts | AntiEntropyPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| 认证失败次数 | Counts | AuthFailure | userId、clusterId、host | Average、Maximum、Minimum |
| CAS读延时 | ms | CasReadLatency | userId、clusterId、host | Average、Maximum、Minimum |
| CAS读请求次数 | Requests/s | CasReadRequest | userId、clusterId、host | Average、Maximum、Minimum |
| CAS读请求未提交次数 | Counts/s | CasReadUnfinishedCommit | userId、clusterId、host | Average、Maximum、Minimum |
| CAS写延时 | ms | CasWriteLatency | userId、clusterId、host | Average、Maximum、Minimum |
| CAS写请求次数 | Requests/s | CasWriteRequest | userId、clusterId、host | Average、Maximum、Minimum |
| CAS写请求未提交次数 | Counts/s | CasWriteUnfinishedCommit | userId、clusterId、host | Average、Maximum、Minimum |
| 客户端连接数 | Connections | ClientConnection | userId、clusterId、host | Average、Maximum、Minimum |
| Major GC耗时 | ms | CmsGc | userId、clusterId、host | Average、Maximum、Minimum |
| Commitlog完成任务数 | Counts | CommitlogCompleteTasks | userId、clusterId、host | Average、Maximum、Minimum |
| Commitlog等待任务数 | Counts | CommitlogPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| Compaction活跃任务数 | Counts | CompactionActiveTasks | userId、clusterId、host | Average、Maximum、Minimum |
| Compaction已完成数据 | Bytes | CompactionCompactedBytes | userId、clusterId、host | Average、Maximum、Minimum |
| Compaction完成任务数 | Counts | CompactionCompleteTasks | userId、clusterId、host | Average、Maximum、Minimum |
| Compaction等待任务数 | Counts | CompactionPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| CounterStage等待任务数 | Counts | CounterStagePendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| CPU硬中断 | % | CpuIrq | userId、clusterId、host | Average、Maximum、Minimum |
| CPU 1分钟负载 | 无 | CpuLoad1 | userId、clusterId、host | Average、Maximum、Minimum |
| CPU 15分钟负载 | 无 | CpuLoad15 | userId、clusterId、host | Average、Maximum、Minimum |
| CPU 5分钟负载 | 无 | CpuLoad5 | userId、clusterId、host | Average、Maximum、Minimum |
| CPU Nice占比 | % | CpuNice | userId、clusterId、host | Average、Maximum、Minimum |
| CPU软中断 | % | CpuSoftIrq | userId、clusterId、host | Average、Maximum、Minimum |
| CPU系统占比 | % | CpuSys | userId、clusterId、host | Average、Maximum、Minimum |
| CPU使用率 | % | CpuUsage | userId、clusterId、host | Average、Maximum、Minimum |
| CPU用户占比 | % | CpuUser | userId、clusterId、host | Average、Maximum、Minimum |
| CPU等待 | % | CpuWait | userId、clusterId、host | Average、Maximum、Minimum |
| 数据盘大小 | Bytes | DataDiskTotal | userId、clusterId、host | Average、Maximum、Minimum |
| 数据盘使用率 | % | DataDiskUsage | userId、clusterId、host | Average、Maximum、Minimum |
| 数据盘使用 | Bytes | DataDiskUsed | userId、clusterId、host | Average、Maximum、Minimum |
| DeleteWithCondition请求数 | Requests | DeleteWithCondition | userId、clusterId、host | Average、Maximum、Minimum |
| 磁盘等待 | ms | DiskAwait | userId、clusterId、host | Average、Maximum、Minimum |
| 磁盘读次数 | Operations/s | DiskInputs | userId、clusterId、host | Average、Maximum、Minimum |
| 磁盘写次数 | Operations/s | DiskOutputs | userId、clusterId、host | Average、Maximum、Minimum |
| 磁盘读数据 | Bytes/s | DiskReads | userId、clusterId、host | Average、Maximum、Minimum |
| 磁盘%util | % | DiskUtil | userId、clusterId、host | Average、Maximum、Minimum |
| 磁盘写数据 | Bytes/s | DiskWrites | userId、clusterId、host | Average、Maximum、Minimum |
| 请求失败数 | Counts | Failures | userId、clusterId、host | Average、Maximum、Minimum |
| GC次数 | Counts | GcCollections | userId、clusterId、host | Average、Maximum、Minimum |
| GC最大耗时 | ms | GcMaxElapsed | userId、clusterId、host | Average、Maximum、Minimum |
| GC回收内存 | Bytes | GcReclaimed | userId、clusterId、host | Average、Maximum、Minimum |
| GC总耗时 | ms | GcTotalElapsed | userId、clusterId、host | Average、Maximum、Minimum |
| Gossip活跃任务数 | Counts | GossipActiveTasks | userId、clusterId、host | Average、Maximum、Minimum |
| Gossip等待任务数 | Counts | GossipPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| 堆内存使用率 | % | HeapMemUsage | userId、clusterId、host | Average、Maximum、Minimum |
| HintDispatcher活跃任务数 | Counts | HintDispatcherActiveTasks | userId、clusterId、host | Average、Maximum、Minimum |
| HintDispatcher等待任务数 | Counts | HintDispatcherPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| Key Cache命中率 | % | KeyCacheHitRate | userId、clusterId、host | Average、Maximum、Minimum |
| Key Cache命中次数 | Hits/s | KeyCacheHits | userId、clusterId、host | Average、Maximum、Minimum |
| Key Cache请求次数 | Requests/s | KeyCacheRequests | userId、clusterId、host | Average、Maximum、Minimum |
| 延时 | ms | Latency | userId、clusterId、host | Average、Maximum、Minimum |
| 内存剩余 | Bytes | MemFree | userId、clusterId、host | Average、Maximum、Minimum |
| 内存使用率 | % | MemUsage | userId、clusterId、host | Average、Maximum、Minimum |
| 内存使用 | Bytes | MemUsed | userId、clusterId、host | Average、Maximum、Minimum |
| MemtableFlushWriter活跃任务数 | Counts | MemtableFlushWriterPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| MemtablePostFlush等待任务数 | Counts | MemtablePostFlushPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| MutationStage等待任务数 | Counts | MutationStagePendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| NativeTransport等待任务数 | Counts | NativeTransportPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| 网络收包丢失数 | Packets/s | NetInputDropped | userId、clusterId、host | Average、Maximum、Minimum |
| 网络收包错误数 | Packets/s | NetInputErrors | userId、clusterId、host | Average、Maximum、Minimum |
| 网络收包Overruns | Packets/s | NetInputOverruns | userId、clusterId、host | Average、Maximum、Minimum |
| 网络收包数 | Packets/s | NetInputs | userId、clusterId、host | Average、Maximum、Minimum |
| 网络发包丢失数 | Packets/s | NetOutputDropped | userId、clusterId、host | Average、Maximum、Minimum |
| 网络发包错误数 | Packets/s | NetOutputErrors | userId、clusterId、host | Average、Maximum、Minimum |
| 网络发包Overruns | Packets/s | NetOutputOverruns | userId、clusterId、host | Average、Maximum、Minimum |
| 网络发包数 | Packets/s | NetOutputs | userId、clusterId、host | Average、Maximum、Minimum |
| 网络收数据 | Bytes/s | NetReads | userId、clusterId、host | Average、Maximum、Minimum |
| 网络发数据 | Bytes/s | NetWrites | userId、clusterId、host | Average、Maximum、Minimum |
| 非堆内存 | Bytes | OffHeapMem | userId、clusterId、host | Average、Maximum、Minimum |
| Minor GC耗时 | ms | ParNewGc | userId、clusterId、host | Average、Maximum、Minimum |
| ParallelScan请求数 | Requests | ParallelScan | userId、clusterId、host | Average、Maximum、Minimum |
| PutWithCondition请求数 | Requests | PutWithCondition | userId、clusterId、host | Average、Maximum、Minimum |
| QueryWithFilter请求数 | Requests | QueryWithFilter | userId、clusterId、host | Average、Maximum、Minimum |
| Range切片延时 | ms | RangeSliceLatency | userId、clusterId、host | Average、Maximum、Minimum |
| Range切片请求次数 | Requests/s | RangeSliceRequest | userId、clusterId、host | Average、Maximum、Minimum |
| 读延时 | ms | ReadLatency | userId、clusterId、host | Average、Maximum、Minimum |
| 读延时95分位 | ms | ReadLatency95 | userId、clusterId、host | Average、Maximum、Minimum |
| 读延时99分位 | ms | ReadLatency99 | userId、clusterId、host | Average、Maximum、Minimum |
| ReadRepairStage等待任务数 | Counts | ReadRepairStagePendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| 读请求次数 | Requests/s | ReadRequest | userId、clusterId、host | Average、Maximum、Minimum |
| ReadStage等待任务数 | Counts | ReadStagePendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| 请求数 | Requests | Request | userId、clusterId、host | Average、Maximum、Minimum |
| Row Cache命中率 | % | RowCacheHitRate | userId、clusterId、host | Average、Maximum、Minimum |
| Row Cache命中次数 | Hits/s | RowCacheHits | userId、clusterId、host | Average、Maximum、Minimum |
| Row Cache请求次数 | Requests/s | RowCacheRequests | userId、clusterId、host | Average、Maximum、Minimum |
| ScanWithFilter请求数 | Requests | ScanWithFilter | userId、clusterId、host | Average、Maximum、Minimum |
| 二级索引等待任务数 | Counts | SecondaryIndexPendingTasks | userId、clusterId、host | Average、Maximum、Minimum |
| 系统盘使用率 | % | SysDiskUsage | userId、clusterId、host | Average、Maximum、Minimum |
| 超时次数 | Counts | Timeouts | userId、clusterId、host | Average、Maximum、Minimum |
| 请求不可用数 | Counts | Unavailables | userId、clusterId、host | Average、Maximum、Minimum |
| UpdateWithCondition请求数 | Requests | UpdateWithCondition | userId、clusterId、host | Average、Maximum、Minimum |
| 视图写延时 | ms | ViewWriteLatency | userId、clusterId、host | Average、Maximum、Minimum |
| 视图写请求次数 | Requests/s | ViewWriteRequest | userId、clusterId、host | Average、Maximum、Minimum |
| 写延时 | ms | WriteLatency | userId、clusterId、host | Average、Maximum、Minimum |
| 写延时95分位 | ms | WriteLatency95 | userId、clusterId、host | Average、Maximum、Minimum |
| 写延时99分位 | ms | WriteLatency99 | userId、clusterId、host | Average、Maximum、Minimum |
| 写请求次数 | Requests/s | WriteRequest | userId、clusterId、host | Average、Maximum、Minimum |