An index optimization operation allows you to reduce the number of segments in an index, thereby increasing search performance in the index.
To perform this operation, there is an overload that takes the MergeOptions instance as a parameter. In the MergeOptions class, there is a method for specifying a cancellation object and a method for specifying whether to perform the operation asynchronously. By default, the operation is performed synchronously.
The following example demonstrates how to perform the index optimization.
constindexFolder='c:/MyIndex/';constdocumentsFolder1='c:/MyDocuments1/';constdocumentsFolder2='c:/MyDocuments2/';constdocumentsFolder3='c:/MyDocuments3/';// Creating an index in the specified folder
constindex=newgroupdocs.search.Index(indexFolder,true);index.add(documentsFolder1);// Indexing documents from the specified folder
index.add(documentsFolder2);// Each call to Add creates at least one new segment in the index
index.add(documentsFolder3);constoptions=newgroupdocs.search.MergeOptions();options.setCancellation(newgroupdocs.search.Cancellation());// Creating cancellation object to be able to cancel the operation
options.getCancellation().cancelAfter(30000);// Setting maximum duration of the operation to 30 seconds
// Merging segments of the index
index.optimize(options);
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