使用apache benchmark(ab) 测试报错汇总

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