From f338d0011cbc83e82b4ff2264a7e37f52190828f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20H=C3=B6gberg?= <john@erlang.org>
Date: Wed, 21 Mar 2018 11:36:25 +0100
Subject: Change default async thread count to 1

All uses of async threads in the built-in drivers have been
replaced with dirty IO, so it no longer makes sense to leave the
default at 10.
---
 erts/doc/src/erl.xml          | 2 +-
 erts/emulator/beam/erl_init.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'erts')

diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 99f0421080..00dec37590 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -572,7 +572,7 @@
       <tag><marker id="async_thread_pool_size"/><c><![CDATA[+A size]]></c></tag>
       <item>
         <p>Sets the number of threads in async thread pool. Valid range
-          is 0-1024. Defaults to 10 if thread support is available.</p>
+          is 0-1024. Defaults to 1.</p>
       </item>
       <tag><c><![CDATA[+B [c | d | i]]]></c></tag>
       <item>
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 8430a5559b..dfbf2c7651 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -60,7 +60,7 @@
 #  include <sys/resource.h>
 #endif
 
-#define ERTS_DEFAULT_NO_ASYNC_THREADS	10
+#define ERTS_DEFAULT_NO_ASYNC_THREADS	1
 
 #define ERTS_DEFAULT_SCHED_STACK_SIZE   128
 #define ERTS_DEFAULT_DCPU_SCHED_STACK_SIZE 40
-- 
cgit v1.2.3