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Apache Cassandra

Apache Cassandra

Improve Apache Cassandra observability.

Extension
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Get insights and access all the key monitoring data gathered by the JMX extension through the overview dashboard included with the extension activation.Navigate through all your monitored Cassandra instances, filter them to your needs and accees the Unified Analysis screen for each one of them.Get individual insights into each one of your Cassandra instances and correlate the metrics gathered from the OneAgent together with the ones gathered by the JMX extension in one single view.
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Overview

Dynatrace automatically detects all applications and microservices deployed in your system and how it uses your database. It provides automatic end-to-end tracing down to a single database statement, database server metrics and log insights. Dynatrace visualizes application to database dependencies for SQL and noSQL databases as well as for cloud databases and self-hosted databases. It also diagnoses anomalies in real-time using AI and pinpoints the root cause down to the slow performing or erroneous SQL statements. Deep code-level insights combined with cloud-native database server monitoring will help you maintain a robust production environment.

Use cases

  • Understand all dependencies of your applications to the database, which database statements are executed and their performance.
  • Improve the performance of your application by reducing or optimizing typical database patterns like the 1+N query problem
  • Understand the resource impact that your applications have on your database.
  • Understand the impact of resource shortages, locks or other database issues have on your application by observing the database server itself.

Get started

For more information on the installation and configuration, please see Apache Cassandra extension in the Dynatrace Documentation.

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Feature sets

Below is a complete list of the feature sets provided in this version. To ensure a good fit for your needs, individual feature sets can be activated and deactivated by your administrator during configuration.

Feature setsNumber of metrics included
Metric nameMetric keyDescriptionUnit
Compaction pending taskscassandra.compaction.pendingTasksThe number of compaction tasks that are pending.Count
Compaction completed taskscassandra.compaction.completedTasksThe number of compaction tasks that have been completed.Count
Compaction ratecassandra.compaction.bytesCompactedThe rate of bytes compacted per second.Bytes
Metric nameMetric keyDescriptionUnit
KeyCache hit ratecassandra.cache.keyCache.hitsThe rate of key cache hits per second.PerSecond
RowCache hit ratecassandra.cache.rowCache.hitsThe rate of row cache hits per second.PerSecond
Metric nameMetric keyDescriptionUnit
Read stage pending taskscassandra.threadPool.request.read.pending.fixThe number of pending tasks in the read stage.Count
Read stage active taskscassandra.threadPool.request.read.active.fixThe number of active tasks in the read stage.Count
Read stage blocked tasks totalcassandra.threadPool.request.read.totalBlocked.fixThe total number of blocked tasks in the read stage.Count
Read stage currently blocked taskscassandra.threadPool.request.read.currentlyBlocked.fixThe number of currently blocked tasks in the read stage.Count
ReadRepair stage pending taskscassandra.threadPool.request.readRepair.pending.fixThe number of pending tasks in the ReadRepair stage.Count
ReadRepair stage active taskscassandra.threadPool.request.readRepair.active.fixThe number of active tasks in the ReadRepair stage.Count
ReadRepair stage blocked tasks totalcassandra.threadPool.request.readRepair.totalBlocked.fixThe total number of blocked tasks in the ReadRepair stage.Count
ReadRepair stage currently blocked taskscassandra.threadPool.request.readRepair.currentlyBlocked.fixThe number of currently blocked tasks in the ReadRepair stage.Count
Mutation stage pending taskscassandra.threadPool.request.mutation.pending.fixThe number of pending tasks in the Mutation stage.Count
Mutation stage active taskscassandra.threadPool.request.mutation.active.fixThe number of active tasks in the Mutation stage.Count
Mutation stage blocked tasks totalcassandra.threadPool.request.mutation.totalBlocked.fixThe total number of blocked tasks in the Mutation stage.Count
Mutation stage currently blocked taskscassandra.threadPool.request.mutation.currentlyBlocked.fixThe number of currently blocked tasks in the Mutation stage.Count
Metric nameMetric keyDescriptionUnit
Read failure ratecassandra.clientRequest.read.failuresThe rate of read failures per second. A read failure occurs when a read request cannot be completed successfully. This can be due to various reasons such as timeouts, unavailable replicas, or other issues in the Cassandra cluster.PerSecond
Read timeout ratecassandra.clientRequest.read.timeoutThe rate of read timeouts per second. A read timeout occurs when a read request cannot be completed within the specified time.PerSecond
Read unavailable ratecassandra.clientRequest.read.unavailablesThe rate of read unavailables per second. A read unavailable occurs when a read request cannot be completed due to unavailable replicas.PerSecond
Read latency ratecassandra.clientRequest.read.latency.rateThe rate of read latencies per second.PerSecond
Read latency 95th percentilecassandra.clientRequest.read.latency.95thPercentileThe 95th percentile of read latencies.MicroSecond
Metric nameMetric keyDescriptionUnit
Exception countcassandra.storage.exceptionsThe number of storage exceptions.Count
Storage loadcassandra.storage.loadThe current load on the storage system.Byte
Storage total hintscassandra.storage.totalHintsThe total number of hints in the storage system.Count
Metric nameMetric keyDescriptionUnit
RangeSlice timeout ratecassandra.clientRequest.rangeSlice.timeoutThe rate of RangeSlice timeouts per second. A RangeSlice timeout occurs when a RangeSlice request cannot be completed within the specified time.PerSecond
RangeSlice failure ratecassandra.clientRequest.rangeSlice.failuresThe rate of RangeSlice failures per second. A RangeSlice failure occurs when a RangeSlice request cannot be completed successfully.PerSecond
RangeSlice unavailable ratecassandra.clientRequest.rangeSlice.unavailablesThe rate of RangeSlice unavailables per second. A RangeSlice unavailable occurs when a RangeSlice request cannot be completed due to unavailable replicas.PerSecond
RangeSlice latency ratecassandra.clientRequest.rangeSlice.latency.rateThe rate of RangeSlice latencies per second.PerSecond
RangeSlice latency 95th percentilecassandra.clientRequest.rangeSlice.latency.95thPercentileThe 95th percentile of RangeSlice latencies.MicroSecond
Metric nameMetric keyDescriptionUnit
Live SSTable countcassandra.columnFamily.liveSSTableCountThe number of live SSTables in the column family.Count
Metric nameMetric keyDescriptionUnit
Write failure ratecassandra.clientRequest.write.failuresThe rate of write failures per second. A write failure occurs when a write request cannot be completed successfully. This can be due to various reasons such as timeouts, unavailable replicas, or other issues in the Cassandra cluster.PerSecond
Write timeout ratecassandra.clientRequest.write.timeoutThe rate of write timeouts per second. A write timeout occurs when a write request cannot be completed within the specified time.PerSecond
Write unavailable ratecassandra.clientRequest.write.unavailablesThe rate of write unavailables per second. A write unavailable occurs when a write request cannot be completed due to unavailable replicas.PerSecond
Write latency ratecassandra.clientRequest.write.latency.rateThe rate of write latencies per second.PerSecond
Write latency 95th percentilecassandra.clientRequest.write.latency.95thPercentileThe 95th percentile of write latencies.MicroSecond

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Full version history

To have more information on how to install the downloaded package, please follow the instructions on this page.
ReleaseDate

Full version history

  • Added description to all metrics
  • Set human-readable name and recommendation for feature sets

Full version history

New in this version:

  • Added keyword key value pairs to extension

Full version history

Minimum Dynatrace version is now 1.310!

Changes

  • Platform ready screen definitions (Infrastructure & Operations App)
  • Includes Dashboards App platform dashboard

Full version history

  • Fix unit in metadata for the following metrics, from PerSecond to MicroSecond:
    • cassandra.clientRequest.rangeSlice.latency.95thPercentile
    • cassandra.clientRequest.read.latency.95thPercentile
    • cassandra.clientRequest.write.latency.95thPercentile

Full version history

  • Fix a bug where graphs for Cassandra JMX metrics were not being correctly injected into the PGI's UA screen

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  • Remove generic type for Cassandra Instance
  • Refactor dashboard

Full version history

  • Conversion from EF1 to EF2 with JMX DS
  • Added new ThreadPool metrics
  • Added custom topology
  • Added screen for the topology
  • Added metric injection for the PGI UA screen
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