Solr Searcher Test

The Searcher (or IndexSearcher) is the Solr internal backend component which performs the core function of indexing and searching. When the new documents or location are added to Solr, Solr searcher starts indexing and the documents are visible and are available for search only when the commit operation is completed. Since searcher is key to overall search efficiency of Solr, it is important for administrators that indexing is working at optimal levels and any issues are reported as soon as possible.

This test monitors the Solr Searcher and collects key metrics related to it's performance like number of documents indexed, commit size etc. These metrics provide valuable insights into searcher efficiency and allows administrators to take prompt action if its performance is below par.

Target of the test : Apache Solr server

Agent deploying the test : An internal/remote agent

Outputs of the test : One set of results for each Solr core in Apache Solr setup.

Configurable parameters for the test

Parameter	Description
Test period	How often should the test be executed
Host	The IP address of the host for which this test is to be configured.
Port	The port at which the target Apache Solr server listens to.
Username & Password	If JMX requires authentication only (but no security), then ensure that the user and password parameters are configured with the credentials of a user with read-write access to JMX.
Confirm Password	Confirm the password by retyping it in this box.
SSL	By default, SSL is disabled for Apache Solr, accordingly SSL flag is set to No by default. If the flag is set to Yes, the eG Agent will start communicating with Apache Solr server HTTPS.
Timeout	By default timeout is 5 secods.
Detailed Diagnosis	To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option. The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled: The eG manager license should allow the detailed diagnosis capability Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.

Measurements made by the test

Measurement	Description	Measurement Unit	Interpretation
Number of documents	Indicates the total number of documents indexed during the last measurement period.	Number	If the number of indexed documents is on a downward trend over last few measurement periods, it may be because of some issue with Searcher which needs to be investigated.
Maximum documents	Indicates the largest possible number of documents which can be handled by Solr Server.	Number	It depends on the current setup of Solr server, RAM availability, storage and compute capability.
Index commit size	Indicates the size of last document index commit.	MB	Large commit size is preferable as it means a lot of documents will be available for search quickly.
Deleted documents	Indicates the total number of documents deleted.	Number