- Release Notes
- Product Introduction
- Purchase guide
- Getting Started
- Operation Guide
- EMR Development Guide
- Hadoop Development Guide
- Spark Development Guide
- Hbase Development Guide
- Phoenix on Hbase Development Guide
- Hive Development Guide
- Presto Development Guide
- Sqoop Development Guide
- Hue Development Guide
- Flume Development Guide
- Kerberos Development Guide
- Knox Development Guide
- Alluxio Development Guide
- Kylin Development Guide
- Livy Development Guide
- Zeppelin Development Guide
- Hudi Development Guide
- Superset Development Guide
- Impala Development Guide
- ClickHouse Development Guide
- Druid Development Guide
- TensorFlow Development Guide
- Jupyter Development Guide
- Kudu Development Guide
- EMR Development Guide
- Ranger Development Guide
- Doris Development Guide
- Iceberg Development Guide
- Data Migration
- API documentation
- FAQs
- Service Level Agreement
- Notices
- Release Notes
- Product Introduction
- Purchase guide
- Getting Started
- Operation Guide
- EMR Development Guide
- Hadoop Development Guide
- Spark Development Guide
- Hbase Development Guide
- Phoenix on Hbase Development Guide
- Hive Development Guide
- Presto Development Guide
- Sqoop Development Guide
- Hue Development Guide
- Flume Development Guide
- Kerberos Development Guide
- Knox Development Guide
- Alluxio Development Guide
- Kylin Development Guide
- Livy Development Guide
- Zeppelin Development Guide
- Hudi Development Guide
- Superset Development Guide
- Impala Development Guide
- ClickHouse Development Guide
- Druid Development Guide
- TensorFlow Development Guide
- Jupyter Development Guide
- Kudu Development Guide
- EMR Development Guide
- Ranger Development Guide
- Doris Development Guide
- Iceberg Development Guide
- Data Migration
- API documentation
- FAQs
- Service Level Agreement
- Notices
Metrics
| Metric Name | Unit | Description |
|---|---|---|
| tcp | - | Number of TCP server connections |
| http | - | Number of HTTP server connections |
| watches | - | Number of ZooKeeper event subscriptions |
| ephemeralNode | - | Number of ephemeral nodes retained in ZooKeeper |
| backgroundPoolTask | - | Number of active tasks in BackgroundProcessingPool |
| backgroundSchedulePoolTask | - | Number of active tasks in BackgroundSchedulePool |
| contextLockWait | - | Number of threads waiting for lock in Context |
| delayedInserts | - | Number of throttled INSERT queries |
| dictCacheRequests | - | Number of requests in the data sources of the dictionaries in cache type |
| distributedSend | - | Number of pending files to be inserted into distributed tables asynchronously |
| global | - | Number of threads in global thread pool |
| globalActive | - | Number of active threads in global thread pool |
| local | - | Number of threads in local thread pool |
| localActive | - | Number of active threads in local thread pool |
| leaderElection | - | Number of replicas participating in leader election |
| leaderReplica | - | Number of replicated tables that are leaders |
| readonlyReplica | - | Number of replicated tables in read-only status |
| memoryTracking | GB | Total size of memory assigned to currently executing queries |
| backgroundProcessingPool | GB | Total size of memory assigned to background processing pool |
| backgroundSchedulePool | GB | Total size of memory assigned to background schedule pool |
| memoryTrackingForMerges | GB | Total size of memory assigned for background merges |
| merge | - | Number of executing background merges |
| read | - | Number of opened readable files |
| write | - | Number of opened writable files |
| partMutation | - | Number of table mutations |
| queryThread | - | Number of query processing threads |
| queryPreempted | - | Number of queries that are stopped or waiting |
| read | - | Number of read system calls |
| write | - | Number of write system calls |
| fetch | - | Number of data blocks fetched from replicas |
| send | - | Number of data blocks sent to replicas |
| check | - | Number of data blocks for consistency check |
| revision | - | Server modification |
| version | 1 | Version number |
| waitingRead | - | Number of threads waiting for read on table read/write lock |
| waitingWrite | - | Number of threads waiting for write on table read/write lock |
| activeRead | - | Number of threads with read lock in table read/write lock |
| activeWrite | - | Number of threads with write lock in table read/write lock |
| storageBufferRows | - | Number of rows in buffer tables |
| storageBufferBytes | MB | Number of bytes in buffer tables |
Events
| Metric Name | Unit | Description |
|---|---|---|
| total | - | Number of queries that may be executed |
| select | - | Number of SELECT queries that may be executed |
| insert | - | Number of INSERT queries that may be executed |
| insertedRows | - | Number of rows inserted into all tables |
| insertedBytes | - | Number of bytes inserted into all tables |
| read | µs | Total time for waiting for read system calls |
| write | µs | Total time for waiting for write system calls |
| fileOpen | - | Number of opened files |
| read | - | Number of reads from file descriptors |
| write | - | Number of writes into file descriptors |
| read | MB | Number of bytes read from file descriptors |
| write | MB | Number of bytes written into file descriptors |
| realtime | µs | Total time for processing threads |
| user | µs | Total time for processing threads executing CPU instructions in user space |
| system | µs | Total time for processing threads executing CPU instructions in OS kernel space |
| regexpCreated | - | Number of compiled regular expressions |
Asynchronous_metrics
| Metric Name | Unit | Description |
|---|---|---|
| markCacheBytes | MB | Size of cache of marks of StorageMergeTree |
| markCacheFiles | - | Number of cache files of marks of StorageMergeTree |
| maxPartCountForPartition | - | Maximum number of active data blocks in partitions |
| databaseCount | - | Number of databases |
| tableCount | - | Number of tables |
| absolute | ms | Maximum replica queue latency |
| relative | µs | Maximum difference of the absolute latency from another replica |
| insert | - | Number of INSERT operations of data blocks that need to be performed |
| merge | - | Number of merges to be completed |
| replicasMaxQueueSize | - | Size of the queue for the operations to be performed |
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