126 lines
6.6 KiB
Markdown
126 lines
6.6 KiB
Markdown
# Telegraf plugin: Cassandra
|
|
|
|
#### Plugin arguments:
|
|
- **context** string: Context root used for jolokia url
|
|
- **servers** []string: List of servers with the format "<user:passwd@><host>:port"
|
|
- **metrics** []string: List of Jmx paths that identify mbeans attributes
|
|
|
|
#### Description
|
|
|
|
The Cassandra plugin collects Cassandra/JVM metrics exposed as MBean's attributes through jolokia REST endpoint. All metrics are collected for each server configured.
|
|
|
|
See: https://jolokia.org/ and [Cassandra Documentation](http://docs.datastax.com/en/cassandra/3.x/cassandra/operations/monitoringCassandraTOC.html)
|
|
|
|
# Measurements:
|
|
Cassandra plugin produces one or more measurements for each metric configured, adding Server's name as `host` tag. More than one measurement is generated when querying table metrics with a wildcard for the keyspace or table name.
|
|
|
|
Given a configuration like:
|
|
|
|
```toml
|
|
[[inputs.cassandra]]
|
|
context = "/jolokia/read"
|
|
servers = [":8778"]
|
|
metrics = ["/java.lang:type=Memory/HeapMemoryUsage"]
|
|
```
|
|
|
|
The collected metrics will be:
|
|
|
|
```
|
|
javaMemory,host=myHost,mname=HeapMemoryUsage HeapMemoryUsage_committed=1040187392,HeapMemoryUsage_init=1050673152,HeapMemoryUsage_max=1040187392,HeapMemoryUsage_used=368155000 1459551767230567084
|
|
```
|
|
|
|
# Useful Metrics:
|
|
|
|
Here is a list of metrics that might be useful to monitor your cassandra cluster. This was put together from multiple sources on the web.
|
|
|
|
- [How to monitor Cassandra performance metrics](https://www.datadoghq.com/blog/how-to-monitor-cassandra-performance-metrics)
|
|
- [Cassandra Documentation](http://docs.datastax.com/en/cassandra/3.x/cassandra/operations/monitoringCassandraTOC.html)
|
|
|
|
####measurement = javaGarbageCollector
|
|
|
|
- /java.lang:type=GarbageCollector,name=ConcurrentMarkSweep/CollectionTime
|
|
- /java.lang:type=GarbageCollector,name=ConcurrentMarkSweep/CollectionCount
|
|
- /java.lang:type=GarbageCollector,name=ParNew/CollectionTime
|
|
- /java.lang:type=GarbageCollector,name=ParNew/CollectionCount
|
|
|
|
####measurement = javaMemory
|
|
|
|
- /java.lang:type=Memory/HeapMemoryUsage
|
|
- /java.lang:type=Memory/NonHeapMemoryUsage
|
|
|
|
####measurement = cassandraCache
|
|
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Hit
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Requests
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Entries
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Size
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Capacity
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Hit
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Requests
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Entries
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Size
|
|
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Capacity
|
|
|
|
####measurement = cassandraClient
|
|
|
|
- /org.apache.cassandra.metrics:type=Client,name=connectedNativeClients
|
|
|
|
####measurement = cassandraClientRequest
|
|
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=TotalLatency
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=TotalLatency
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Latency
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Latency
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Timeouts
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Timeouts
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Unavailables
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Unavailables
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Failures
|
|
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Failures
|
|
|
|
####measurement = cassandraCommitLog
|
|
|
|
- /org.apache.cassandra.metrics:type=CommitLog,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=CommitLog,name=TotalCommitLogSize
|
|
|
|
####measurement = cassandraCompaction
|
|
|
|
- /org.apache.cassandra.metrics:type=Compaction,name=CompletedTask
|
|
- /org.apache.cassandra.metrics:type=Compaction,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=Compaction,name=TotalCompactionsCompleted
|
|
- /org.apache.cassandra.metrics:type=Compaction,name=BytesCompacted
|
|
|
|
####measurement = cassandraStorage
|
|
|
|
- /org.apache.cassandra.metrics:type=Storage,name=Load
|
|
- /org.apache.cassandra.metrics:type=Storage,name=Exceptions
|
|
|
|
####measurement = cassandraTable
|
|
Using wildcards for "keyspace" and "scope" can create a lot of series as metrics will be reported for every table and keyspace including internal system tables. Specify a keyspace name and/or a table name to limit them.
|
|
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=LiveDiskSpaceUsed
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=TotalDiskSpaceUsed
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=ReadLatency
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=CoordinatorReadLatency
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=WriteLatency
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=ReadTotalLatency
|
|
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=WriteTotalLatency
|
|
|
|
|
|
####measurement = cassandraThreadPools
|
|
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=internal,scope=CompactionExecutor,name=ActiveTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=internal,scope=AntiEntropyStage,name=ActiveTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=CounterMutationStage,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=CounterMutationStage,name=CurrentlyBlockedTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=MutationStage,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=MutationStage,name=CurrentlyBlockedTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadRepairStage,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadRepairStage,name=CurrentlyBlockedTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadStage,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadStage,name=CurrentlyBlockedTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=RequestResponseStage,name=PendingTasks
|
|
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=RequestResponseStage,name=CurrentlyBlockedTasks
|
|
|
|
|