1、socket: Too many open files (24)
解决方法：
[root@zabbix ~]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 14802
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 14802
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
调整可以打开的文件数
[root@zabbix ~]# ulimit -n 65535
2、http错误日志报错
server reached MaxClients setting,consider raising the Max Clients setting”
设置如下：
/etc/httpd/conf/httpd.conf ## Server-Pool Size Regulation (MPM specific) ## # prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # ServerLimit: maximum value for MaxClients for the lifetime of the server # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule prefork.c> StartServers 10 MinSpareServers 10 MaxSpareServers 75 ServerLimit 2000 MaxClients 2000 MaxRequestsPerChild 4000 </IfModule> # worker MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule worker.c> StartServers 4 MaxClients 2000 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule>
3、: apr_socket_recv: Connection reset by peer (104)
改服务端apache的maxclients参数,调大最大打开文件数,都不解决问题,最后才发现是因为ab的源码对ab的并发有限制,修改源码重新编译apache:
Apache源码下载地址：http://httpd.apache.org/download
我下的是 2.2
修改源码support目录下的ab.c文件，大概在1369行,修改为:
/* catch legitimate fatal apr_socket_recv errors */
else if (status != APR_SUCCESS) {
err_recv++;
if (recverrok) {
bad++;
close_connection(c);
if (verbosity >= 1) {
char buf[120];
fprintf(stderr,"%s: %s (%d)\n", "apr_socket_recv", apr_strerror(status, buf, sizeof buf), status);
}
return;
} else {
// apr_err("apr_socket_recv", status);
bad++;
close_connection(c);
return; // 到这里
}
}
修改后编译，注意添加 config 执行权限。
我是把编译后的ab可执行文件拷贝过来，避免重装apache。建一个目录执行即可。
4、其他参考
l apache的源码安装详细过程全纪录http://www.jb51.net/article/59474.htm
l apr_socket_recv: Connection reset by peer 错误（安装参考，并没有解决问题）http://blog.csdn.net/kimsung/article/details/9422991
l Ab测试说明博文 http://blog.csdn.net/gzh0222/article/details/7172341
l 网站服务器压力Web性能测试:Apache Bench,Webbench,http_load安装使用 http://www.freehao123.com/apache-bench-webbench/
l Apache下载地址: http://apache.fayea.com/
卸载centos默认的apache: http://blog.sina.com.cn/s/blog_701300bc0100nzea.html