Increase default write queue size (#59559)

This commit increases the default write queue size to 10000. This is to
allow a greater number of pending indexing requests. This work is safe
as we have added additional memory limits. Relates to #59263.

server/src/main/java/org/elasticsearch/threadpool/ThreadPool.java

@@ -163,7 +163,7 @@ public ThreadPool(final Settings settings, final ExecutorBuilder<?>... customBui
         final int halfProcMaxAt10 = halfAllocatedProcessorsMaxTen(allocatedProcessors);
         final int genericThreadPoolMax = boundedBy(4 * allocatedProcessors, 128, 512);
         builders.put(Names.GENERIC, new ScalingExecutorBuilder(Names.GENERIC, 4, genericThreadPoolMax, TimeValue.timeValueSeconds(30)));
-        builders.put(Names.WRITE, new FixedExecutorBuilder(settings, Names.WRITE, allocatedProcessors, 200, false));
+        builders.put(Names.WRITE, new FixedExecutorBuilder(settings, Names.WRITE, allocatedProcessors, 10000, false));
         builders.put(Names.GET, new FixedExecutorBuilder(settings, Names.GET, allocatedProcessors, 1000, false));
         builders.put(Names.ANALYZE, new FixedExecutorBuilder(settings, Names.ANALYZE, 1, 16, false));
         builders.put(Names.SEARCH, new FixedExecutorBuilder(settings, Names.SEARCH, searchThreadPoolSize(allocatedProcessors), 1000, true));