From 3de17b6d448ae20507e28f196bb48755ac169fca Mon Sep 17 00:00:00 2001
From: Nik Everett <nik9000@gmail.com>
Date: Mon, 23 Sep 2024 11:03:37 -0400
Subject: [PATCH] ESQL: Document esql_worker threadpool (#113203)

Documents the thread pool we use to run ESQL operations. It's the same
size and queue depth as the `search` thread pool.

Closes #113130
---
 docs/reference/modules/threadpool.asciidoc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/reference/modules/threadpool.asciidoc b/docs/reference/modules/threadpool.asciidoc
index ed4becbfbb6d0..2d4110bdcb431 100644
--- a/docs/reference/modules/threadpool.asciidoc
+++ b/docs/reference/modules/threadpool.asciidoc
@@ -121,6 +121,11 @@ There are several thread pools, but the important ones include:
     `min(5 * (`<<node.processors, `# of allocated processors`>>`), 50)`
     and queue_size of `1000`.
 
+[[modules-threadpool-esql]]`esql_worker`::
+    Executes <<esql>> operations. Thread pool type is `fixed` with a
+    size of `int((`<<node.processors, `# of allocated processors`>>
+    `pass:[ * ]3) / 2) + 1`, and queue_size of `1000`.
+
 Thread pool settings are <<static-cluster-setting,static>> and can be changed by
 editing `elasticsearch.yml`. Changing a specific thread pool can be done by
 setting its type-specific parameters; for example, changing the number of