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authorSiri Hansen <[email protected]>2018-05-21 15:00:58 +0200
committerSiri Hansen <[email protected]>2018-05-21 15:20:01 +0200
commit9cc697fe2cda12ed2d32fb134ed5584f248f9377 (patch)
tree4cad41ee672347596ee61a97e97735170dcc322a /lib/kernel/doc
parente1957dd0920276ea942002477a3317cd8d1e7b5e (diff)
parent681bc6ad427fce5f087ccc48fb0172b46c02b52a (diff)
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Merge remote-tracking branch 'peppe/peppe/kernel/logger_handler_fixes'
* peppe/peppe/kernel/logger_handler_fixes: Various logger handler improvements and updated test cases Make it possible to disable sync and drop mode Conflicts: lib/kernel/test/logger_disk_log_h_SUITE.erl lib/kernel/test/logger_std_h_SUITE.erl
Diffstat (limited to 'lib/kernel/doc')
-rw-r--r--lib/kernel/doc/src/logger_chapter.xml16
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/kernel/doc/src/logger_chapter.xml b/lib/kernel/doc/src/logger_chapter.xml
index 519df2ba48..3150c5adb4 100644
--- a/lib/kernel/doc/src/logger_chapter.xml
+++ b/lib/kernel/doc/src/logger_chapter.xml
@@ -661,10 +661,20 @@ do_log(Fd,Log,#{formatter:={FModule,FConfig}}) ->
</item>
</taglist>
- <p>For the overload protection algorithm to work properly, it is a
- requirement that:</p>
+ <p>For the overload protection algorithm to work properly, it is
+ required that:</p>
- <p><c>toggle_sync_qlen &lt; drop_new_reqs_qlen &lt; flush_reqs_qlen</c></p>
+ <p><c>toggle_sync_qlen =&lt; drop_new_reqs_qlen =&lt; flush_reqs_qlen</c></p>
+
+ <p>and that:</p>
+
+ <p><c>drop_new_reqs_qlen &gt; 1</c></p>
+
+ <p>If <c>toggle_sync_qlen</c> is set to <c>0</c>, the handler will handle all
+ requests synchronously. Setting the value of <c>toggle_sync_qlen</c> to the same
+ as <c>drop_new_reqs_qlen</c>, disables the synchronous mode. Likewise, setting
+ the value of <c>drop_new_reqs_qlen</c> to the same as <c>flush_reqs_qlen</c>,
+ disables the drop mode.</p>
<p>During high load scenarios, the length of the handler message queue
rarely grows in a linear and predictable way. Instead, whenever the