Monitoring Apache Solr
The Apache Solr sensor is automatically deployed and installed after you install the Instana agent.
Supported Versions
Currently, supported versions are Apache Solr 4.0 or newer.
Configuration
To collect data, JMX module needs to be enabled in Solr:
- Add
<jmx />to<SOLR_HOME>/server/solr/configsets/basic_configs/conf/solrconfig.xml - Set
ENABLE_REMOTE_JMX_OPTS="true"in<SOLR_HOME>/bin/solr.in.sh.
Metrics collection
To view the metrics, select Infrastructure in the sidebar of the Instana User interface, click a specific monitored host, and then you can see a host dashboard with all the collected metrics and monitored processes.
Configuration data
- Port
- Version
- Cores
- Name
- Version
- Start Time
Performance Metrics (per core)
| Metric | Description |
|---|---|
| Average request time | Average time for request processing |
| Requests | Number of requests |
| Cache Lookups | Number of cache lookups |
| Cache Hit Rate | Cache hit percentage |
| Inserts | Number of inserts |
| Evictions | Number of evictions |
| Errors | Number of server errors |
| Timeouts | Number of timeouts |
| Documents Added | Number of added documents |
| Documents Pending | Number of pending documents (to be processed) |
Note: To see these metrics that you need to define your cores.
Health Signatures
For each sensor, there is a curated knowledgebase of health signatures that are evaluated continuously against the incoming metrics and are used to raise issues or incidents, which depend on user impact.
Built-in events trigger issues or incidents based on failing health signatures on entities, and custom events trigger issues or incidents based on the thresholds of an individual metric of any entity.
For information about built-events for Solr Node, see Built-in events reference.
Cloud
Tracked Configuration
- Cluster name
- Nodes or Number of nodes
- Shards or Number of shards
Metrics
| Metric | Description |
|---|---|
| Average request time | Average time for request processing |
| Requests | Number of requests |
| Cache Lookups | Number of cache lookups |
| Cache Hit Rate | Cache hit percentage |
| Inserts | Number of inserts |
| Evictions | Number of evictions |
| Errors | Number of server errors |
| Timeouts | Number of timeouts |
| Documents Added | Number of added documents |
| Documents Pending | Number of pending documents (to be processed) |
Health Signatures
For information about built-events for Solr Cloud, see the Built-in events reference.