high CPU Load since upgrade 1.4.20 to 1.4.21
Since I upgrade lighttpd 1.4.20 to 1.4.21, my CPU load increase a lot. At the same time, I upgrade php 5.2.6 to 5.2.8
In the attachment, you can see the upgrade (done the 22th february).
I'm not sure it's a lighttpd problem, it could be a PHP problem.
Sysinfo :
OS FreeBSD
audrey# uname -a FreeBSD audrey.xxx.net 6.3-RELEASE FreeBSD 6.3-RELEASE #0: Wed Jan 16 04:45:45 UTC 2008 root@dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/SMP i386
LighttpD
audrey# lighttpd -V
lighttpd-1.4.21 (ssl) - a light and fast webserver
Build-Date: Feb 24 2009 04:20:40
Event Handlers:
+ select (generic)
+ poll (Unix)
- rt-signals (Linux 2.4+)
- epoll (Linux 2.6)
- /dev/poll (Solaris)
+ kqueue (FreeBSD)
Network handler:
+ sendfile
Features:
- IPv6 support
+ zlib support
+ bzip2 support
+ crypt support
+ SSL Support
+ PCRE support
- mySQL support
- LDAP support
+ memcached support
+ FAM support
+ LUA support
+ xml support
+ SQLite support
- GDBM support
the compil date is just with a test with removing some useless stuff for me like IPv6 support and adding (for test load) FAM support.
PHP
audrey# php -v PHP 5.2.8 with Suhosin-Patch 0.9.6.3 (cli) (built: Feb 24 2009 04:28:47) Copyright (c) 1997-2008 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies
Compiled with usual stuff, no change.
I use :
server.network-backend = "writev" server.max-request-size = 16384 server.event-handler = "freebsd-kqueue" server.stat-cache-engine = "fam"
I try a lot of different options, and just after the upgrade, without "server.network-backend = "writev"", upload file bigger than arround 100Ko failed without error message.
Arround 20 requests/second at this time, 100 requests/second at the "worst" moment of day...
I hope I'll give all information, I found 2 or 3 bugs could be the origin of the problem, but not sure...
Edit : This lighttpd use almost only SSL v3
