Apache 性能最优化分析(8)

王朝厨房·作者佚名  2007-01-02
窄屏简体版  字體: |||超大  

附录:对某次跟踪状况的详细分析

本附录描述了运行在Linux上的Apache 1.3系统调用的跟踪情况。运行时(run-time)配置文件中除了必要的缺省选项外还增加了:

AllowOverride none

Options FollowSymLinks

被请求的文件是一个6K的静态网页,其中不包含特殊内容。对于非静态或者伴随有内容协商的请求,跟踪结果将有明显的不同(一些情况下会十分晦涩)。我们将首先列出完整的跟踪结果,然后逐条进行分析。(它是由strace跟踪程序生成的,其他类似的程序包括truss、ktrace和par)

accept(15, {sin_family=AF_INET, sin_port=htons(22283), sin_addr=inet_addr("127.0.0.1")}, [16]) = 3

flock(18, LOCK_UN) = 0

sigaction(SIGUSR1, {SIG_IGN}, {0x8059954, [], SA_INTERRUPT}) = 0

getsockname(3, {sin_family=AF_INET, sin_port=htons(8080), sin_addr=inet_addr("127.0.0.1")}, [16]) = 0

setsockopt(3, IPPROTO_TCP1, [1], 4) = 0

read(3, "GET /6k HTTP/1.0\r\nUser-Agent: "..., 4096) = 60

sigaction(SIGUSR1, {SIG_IGN}, {SIG_IGN}) = 0

time(NULL) = 873959960

gettimeofday({873959960, 404935}, NULL) = 0

stat("/home/dgaudet/ap/apachen/htdocs/6k", {st_mode=S_IFREG|0644, st_size=6144, ...}) = 0

open("/home/dgaudet/ap/apachen/htdocs/6k", O_RDONLY) = 4

mmap(0, 6144, PROT_READ, MAP_PRIVATE, 4, 0) = 0x400ee000

writev(3, [{"HTTP/1.1 200 OK\r\nDate: Thu, 11"..., 245}, {"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 6144}], 2) = 6389

close(4) = 0

time(NULL) = 873959960

write(17, "127.0.0.1 - - [10/Sep/1997:23:39"..., 71) = 71

gettimeofday({873959960, 417742}, NULL) = 0

times({tms_utime=5, tms_stime=0, tms_cutime=0, tms_cstime=0}) = 446747

shutdown(3, 1 /* send */) = 0

oldselect(4, [3], NULL, [3], {2, 0}) = 1 (in [3], left {2, 0})

read(3, "", 2048) = 0

close(3) = 0

sigaction(SIGUSR1, {0x8059954, [], SA_INTERRUPT}, {SIG_IGN}) = 0

munmap(0x400ee000, 6144) = 0

flock(18, LOCK_EX) = 0

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
 
 
© 2005- 王朝網路 版權所有 導航