MetricsHub
MetricsHub Community Connectors 1.0.22

 Supported Platforms[1]   Connectors Directory[2]

Apache Cassandra

Description

Monitors performance, operational metrics, and cluster health for Cassandra databases through Java Management Extensions (JMX)

community[3] database[4] linux[5] windows[6]

Source[7]

Target

Typical platform: Cassandra[8]

Operating systems: Linux, Microsoft Windows

Prerequisites

Leverages: Apache Cassandra 3.0 or higher

Technology and protocols: JMX

Examples

CLI

metricshub HOSTNAME -t linux -c +Cassandra --jmx -u USER --jmx-port 7199

metricshub.yaml

resourceGroups:
  <RESOURCE_GROUP>:
    resources:
      <HOSTNAME-ID>:
        attributes:
          host.name: <HOSTNAME> # Change with actual host name
          host.type: linux
        connectors: [ +Cassandra ] # Optional, to load only this connector
        protocols:
          jmx:
            port: 7199
            username: <USERNAME> # Change with actual credentials
            password: <PASSWORD> # Encrypted using metricshub-encrypt

Connector Activation Criteria

The Apache Cassandra connector will be automatically activated, and its status will be reported as OK if all the below criteria are met:

  • The JMX request below succeeds when querying the monitored resource:
    • Object Name: org.apache.cassandra.metrics:type=Storage,name=Load
    • Attribute: Count
    • Expected Result: ^[0-9] (regex)

Metrics

Type Collected Metrics Specific Attributes
cache
  • db.server.cache.operations{db.cache.state="hit"}
  • db.server.cache.operations{db.cache.state="miss"}
  • db.server.cache.requests
  • db.server.cache.size
  • db.cassandra.cache.type
  • db.cluster.name
  • db.server.name
  • db.system
  • db.version
cassandra
  • db.server.cache.usage{db.cache.state="off_heap", db.cassandra.cache.type="memtable"}
  • db.server.cache.usage{db.cache.state="on_heap", db.cassandra.cache.type="memtable"}
  • db.server.cassandra.hints
  • db.server.current_connections
  • db.server.errors{error.type="read_timeout"}
  • db.server.errors{error.type="read_unavailable"}
  • db.server.errors{error.type="write_timeout"}
  • db.server.errors{error.type="write_unavailable"}
  • db.server.operations{db.io.direction="read"}
  • db.server.operations{db.io.direction="write"}
  • db.server.pending_operations{db.operation.type="compaction"}
  • db.server.storage.io{db.io.direction="write"}
  • db.server.storage.size
  • db.server.uptime
  • db.cluster.name
  • db.server.name
  • db.system
  • db.version
cassandra_cluster
  • db.server.cassandra.nodes{db.node.state="joining"}
  • db.server.cassandra.nodes{db.node.state="leaving"}
  • db.server.cassandra.nodes{db.node.state="live"}
  • db.server.cassandra.nodes{db.node.state="moving"}
  • db.server.cassandra.nodes{db.node.state="unreachable"}
  • db.cluster.name
  • db.server.name
  • db.system
  • db.version
thread
  • db.server.threads{db.thread.state="active"}
  • db.server.threads{db.thread.state="blocked"}
  • db.server.threads{db.thread.state="pending"}
  • db.cassandra.thread.role
  • db.cluster.name
  • db.server.name
  • db.system
  • db.thread.pool
  • db.version
metricshub community connector hardware system
Links:
  • [1] ../supported-platforms.html
  • [2] ../connectors-directory.html
  • [3] tags/community.html
  • [4] tags/database.html
  • [5] tags/linux.html
  • [6] tags/windows.html
  • [7] https://github.com/metricshub/community-connectors/tree/main/src/main/connector/database/Cassandra/Cassandra.yaml
  • [8] platforms/cassandra.html
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