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Feature #1014

closed

comparing strace of single request through lighty-1.5-svn and nginx-0.5.10

Added by Anonymous about 18 years ago. Updated about 1 year ago.

Status:
Fixed
Priority:
Normal
Category:
core
Target version:
-
ASK QUESTIONS IN Forums:
No

Description

I used the following commands to capture the strace

system is Centos 4.4/x86-64

strace -f -o nginx.strace nginx -c conf/webserver.conf
strace -f o lighttpd.strace lighttpd -D -f webserver.conf

both nginx/lighty configs are setup for epoll and sendfile. access/error log is disabled for both
client is http_load -fetches 1 -parallels 1 file-containing-url

I can't figure out why lighty has open/stat of /etc/localtime whereas nginx doesn't have any
also lighty-svn seems to open the file which is to be sent twice compared to nginx single time

-- yusufg

Files

Download all files
nginx.strace (14.6 KB) nginx.strace strace of nginx 0.5.10 yusufg, 2007-02-08 11:55
lighttpd.strace (50.1 KB) lighttpd.strace strace of lighty r1620 yusufg, 2007-02-08 11:56
lighty.strace (14.6 KB) lighty.strace strace with server.max-stat-threads = 0 yusufg, 2007-02-08 12:01
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 #1

Updated by stbuehler over 16 years ago

  • Status changed from New to Fixed
  • Resolution set to wontfix

/etc/localtime is probably opened by some time related library function. and the stat function in lihgty checks if it can really open a file. i have no problem with that.

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 #2

Updated by stbuehler over 16 years ago

  • Status changed from Fixed to Wontfix
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 #3

Updated by gstrauss about 1 year ago

  • Description updated (diff)
  • Status changed from Wontfix to Fixed
  • ASK QUESTIONS IN Forums set to No

Fixed a long time ago.

Unless the server.stat-cache-engine is disabled, lighttpd 1.4.56 and later cache open file descriptors, reducing stat() and open() for repeated requests to the same file in a short timeframe (default 1 second).

Even older versions of lighttpd cache the unix time (in seconds since 1970) once per event loop and reuse this value with formatting Date in response headers.

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