Performance Analyzer is an agent and REST API that allows you to query numerous performance metrics for your cluster, including aggregations of those metrics, independent of the Java Virtual Machine (JVM). PerfTop is the default command line interface (CLI) for displaying those metrics.
To download PerfTop, see Download on the Open Distro for Elasticsearch website.
You can also install it using npm:
npm install -g @aws/opendistro-for-elasticsearch-perftop
Get started with PerfTop
The basic syntax is:
./perf-top-<operating_system> --dashboard <dashboard>.json --endpoint <endpoint>
If you’re using npm, the syntax is similar:
perf-top --dashboard <dashboard> --endpoint <endpoint>
If you’re running PerfTop from a node (i.e. locally), specify port 9600:
./perf-top-linux --dashboard dashboards/<dashboard>.json --endpoint localhost:9600
Otherwise, just specify the Elasticsearch endpoint:
./perf-top-macos --dashboard dashboards/<dashboard>.json --endpoint my-cluster.my-domain.com
PerfTop has four pre-built dashboards in the
dashboards directory, but you can also create your own.
You can also load the pre-built dashboards (ClusterOverview, ClusterNetworkMemoryAnalysis, ClusterThreadAnalysis, or NodeAnalysis) without the JSON files, such as
PerfTop has no interactivity. Start the application, monitor the dashboard, and press esc, q, or Ctrl + C to quit.
- For NodeAnalysis and similar custom dashboards, you can add the
--nodename <node_name>argument if you want your dashboard to display metrics for only a single node.
- For troubleshooting, add the
Performance Analyzer configuration
Performance Analyzer uses
/dev/shm for temporary storage. During heavy workloads on a cluster, Performance Analyzer can use up to 1 GB of space.
Docker, however, has a default
/dev/shm size of 64 MB. To change this value, you can use the
docker run --shm-size 1gb flag or a similar setting in Docker Compose.
If you’re not using Docker, check the size of
df -h. The default value is probably plenty, but if you need to change its size, add the following line to
tmpfs /dev/shm tmpfs defaults,noexec,nosuid,size=1G 0 0
Then remount the file system:
mount -o remount /dev/shm