Search thread safety Leave feedback
Search in an index is a thread safe operation. This means that calls to the Search and SearchNext methods can be made from different threads to the same instance of the Index class without any cross-threading problems.
Simultaneous search from different threads is a thread safe operation and can be performed even during indexing, updating, optimizing, and merging operations.
However, indexing, updating, optimizing, and merging operations themselves cannot be performed at the same time. A new start of one of these operations before the completion of the previous operation will result in an error.
Details on performing these operations can be found in the Indexing section and on the Merge indexes, Optimize index, and Update index pages.
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