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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.
  • Product information
  • Release notes

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

Get started for Apache Cassandra database clients:

If your client application runs on a virtual machine or bare-metal, install OneAgent on it to get started.

If your client application runs as a workload in Kubernetes or OpenShift, set up Dynatrace on Kubernetes or OpenShift.

Activate the following OneAgent features to get tracing insight:

  • Java CQL
  • Java Datastax Cql
  • Go CQL (gocql/gocql)

Activate log monitoring to get log insight.

Get started for Apache Cassandra database servers:

If your database server runs on a virtual machine or bare-metal, install OneAgent on it to get started.

Activate the Cassandra JMX extension to get insight into database server's health and performance combined with metrics and events. Click on Add to envrionment.

Activate log monitoring to get full log insight.

Extension

The Apache Cassandra JMX server monitoring extension in Dynatrace provides information about database exceptions, failed requests, performance, and more. If Cassandra is underperforming or a problem occurs, Dynatrace lets you know immediately and shows you which nodes are affected.

This is a JMX (Java Management Extension) Dynatrace extension. JMX is ideal for monitoring applications built using Java. Make sure you are monitoring your Cassandra process as the extension does not support gathering metrics from the client-side.

Click on Add to environment to get started.

Prerequisites

  • Cassandra 2+
  • Windows or Linux

Output

The dashboard Cassandra JMX Overview will be included in the extension, where you can see an overview of your Cassandra JXM metrics.

Additionally, all metrics captured by the extension will be appended to the process group instance unified analysis screen in three new sections: Exceptions, Usage and Thread Pool. Make sure to be on the new screen for process group instances to see them.

All metrics can also be viewed with the data explorer.

Licensing Consumption

The extension consumes DDU Units. However, they are elgible for the free tier included with every host. The amount of DDUs units depends on the number of instances monitored.

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Extension content

Content typeNumber of items included
screen injections
3
metric metadata
36
screen actions
1
dashboards
1
screen chart groups
3

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
Read failure ratecassandra.clientRequest.read.failures-PerSecond
Read timeout ratecassandra.clientRequest.read.timeout-PerSecond
Read unavailable ratecassandra.clientRequest.read.unavailables-PerSecond
Read latency ratecassandra.clientRequest.read.latency.rate-PerSecond
Read latency 95th percentilecassandra.clientRequest.read.latency.95thPercentile-MicroSecond
Metric nameMetric keyDescriptionUnit
Exception countcassandra.storage.exceptions-Count
Storage loadcassandra.storage.load-Byte
Storage total hintscassandra.storage.totalHints-Count
Metric nameMetric keyDescriptionUnit
RangeSlice timeout ratecassandra.clientRequest.rangeSlice.timeout-PerSecond
RangeSlice failure ratecassandra.clientRequest.rangeSlice.failures-PerSecond
RangeSlice unavailable ratecassandra.clientRequest.rangeSlice.unavailables-PerSecond
RangeSlice latency ratecassandra.clientRequest.rangeSlice.latency.rate-PerSecond
RangeSlice latency 95th percentilecassandra.clientRequest.rangeSlice.latency.95thPercentile-MicroSecond
Metric nameMetric keyDescriptionUnit
Live SSTable countcassandra.columnFamily.liveSSTableCount-Count
Metric nameMetric keyDescriptionUnit
Write failure ratecassandra.clientRequest.write.failures-PerSecond
Write timeout ratecassandra.clientRequest.write.timeout-PerSecond
Write unavailable ratecassandra.clientRequest.write.unavailables-PerSecond
Write latency ratecassandra.clientRequest.write.latency.rate-PerSecond
Write latency 95th percentilecassandra.clientRequest.write.latency.95thPercentile-MicroSecond
Metric nameMetric keyDescriptionUnit
-cassandra.compaction.pendingTasks--
-cassandra.compaction.completedTasks--
Compaction ratecassandra.compaction.bytesCompacted-Bytes
Metric nameMetric keyDescriptionUnit
KeyCache hit ratecassandra.cache.keyCache.hits-PerSecond
RowCache hit ratecassandra.cache.rowCache.hits-PerSecond
Metric nameMetric keyDescriptionUnit
-cassandra.threadPool.request.read.pending.fix--
-cassandra.threadPool.request.read.active.fix--
Read stage blocked tasks totalcassandra.threadPool.request.read.totalBlocked.fix-Count
Read stage currently blocked taskscassandra.threadPool.request.read.currentlyBlocked.fix-Count
-cassandra.threadPool.request.readRepair.pending.fix--
-cassandra.threadPool.request.readRepair.active.fix--
ReadRepair stage blocked tasks totalcassandra.threadPool.request.readRepair.totalBlocked.fix-Count
ReadRepair stage currently blocked taskscassandra.threadPool.request.readRepair.currentlyBlocked.fix-Count
-cassandra.threadPool.request.mutation.pending.fix--
-cassandra.threadPool.request.mutation.active.fix--
Mutation stage blocked tasks totalcassandra.threadPool.request.mutation.totalBlocked.fix-Count
Mutation stage currently blocked taskscassandra.threadPool.request.mutation.currentlyBlocked.fix-Count
Customer story Photobox
“With such a diverse technology stack, not many solutions were able to meet all our needs, but Dynatrace was the exception.”
Alex Hibbitt
Engineering Director, SRE & Fulfillment
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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

  • 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

Full version history

  • 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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