Bug #68824 [NEW]: php-rpm pm=static causes load peaks when pm.max_requests is reached
From: rainer-phpbugs at 7val dot com
Operating system: linux
PHP version: 5.6.4
Package: Performance problem
Bug Type: Bug
Bug description:php-rpm pm=static causes load peaks when pm.max_requests is reached
Description:
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By design, php-fpm starts all pm.max_children at the same time, and
therefore, will also re-start all children roughly at the same time when
they reach pm.max_requests. This causes the load on the Server, as well
as latencies to increase until all children are re-started, their caches
warmed up etc.
It would be preferable to randomize the number of requests until a child
is reaped, instead of always using exactly pm.max_requests. For example,
a random value within pm.max_requests plus or minus 10% could be chosen
for each child.
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Edit bug report at https://bugs.php.net/bug.php?id=68824&edit=1
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Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68824&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68824&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68824&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=68824&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=68824&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=68824&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=68824&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=68824&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=68824&r=support
Expected behavior: https://bugs.php.net/fix.php?id=68824&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=68824&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=68824&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=68824&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68824&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=68824&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=68824&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=68824&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=68824&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=68824&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=68824&r=mysqlcfg
Thread (2 messages)
- rainer-phpbugs at 7val dot com