DivyanshIITB commented on code in PR #14335:
URL: https://github.com/apache/lucene/pull/14335#discussion_r1998645110
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lucene/core/src/java/org/apache/lucene/index/MultiTenantMergeScheduler.java:
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@@ -0,0 +1,44 @@
+package org.apache.lucene.index;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.io.IOException;
+
+/**
+ * A multi-tenant merge scheduler that shares a global thread pool across
multiple IndexWriters.
+ */
+public class MultiTenantMergeScheduler extends MergeScheduler {
+
+ // Shared global thread pool
+ private static final ExecutorService MERGE_THREAD_POOL =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() / 2);
Review Comment:
Thanks for the suggestion! I've updated the implementation to use lazy
static initialization by wrapping the thread pool in a nested static class.
This ensures the thread pool is only created when first accessed, avoiding
unnecessary resource allocation. Let me know if you have any further feedback!
Now, instead of directly initializing MERGE_THREAD_POOL, I'm using a LazyHolder
class with a getMergeThreadPool() method to ensure thread-safe lazy
initialization. This should prevent the thread pool from being created when the
policy is unused."
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