由于 mysql 和 http 的负载很高，我最近为我的 apache 服务器设置了一个 nginx 反向代理。我运行一个 phpbb 论坛，每天访问量约为 12k。我现在的负载大约是 40。我已经关注了 tune-primer 和 mysqltuner，但负载仍然很高。
服务器：四核英特尔，2GB 内存
这是我的配置，
skip-locking
bind-address=127.0.0.1
key_buffer = 200M
#query_cache_type = OFF
max_allowed_packet = 1M
table_cache = 105
#thread_cache_size 10
query_cache_size = 12M
sort_buffer_size = 1M
join_buffer_size = 3M
query_cache_min_res_unit = 50K
read_buffer_size = 256K
read_rnd_buffer_size = 2M
max_connections = 200
net_buffer_length = 2K
log-slow-queries=/var/log/mysql/log-slow-queries.log
thread_stack = 128K
thread_cache_size = 200
[isamchk]
key_buffer = 32M
sort_buffer_size = 32M
[myisamchk]
key_buffer = 8M
sort_buffer_size = 8M
[mysqlhotcopy]
interactive-timeout
Apache prefork：
<IfModule prefork.c>
StartServers 2
MinSpareServers 2
MaxSpareServers 4
ServerLimit 70
MaxClients 70
MaxRequestsPerChild 700
最佳：
top - 17:57:28 up 41 days, 9:32, 4 users, load average: 48.89, 48.98, 41.17
Tasks: 229 total, 31 running, 190 sleeping, 6 stopped, 2 zombie
Cpu(s): 87.2%us, 12.6%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 2073600k total, 1986292k used, 87308k free, 77628k buffers
Swap: 4192956k total, 22712k used, 4170244k free, 1084108k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
15783 mysql 15 0 275m 75m 4180 S 97.4 3.7 2:56.22 mysqld
15116 apache 16 0 29852 15m 4468 R 8.3 0.8 0:15.08 httpd
15910 apache 15 0 30064 14m 3404 S 8.3 0.7 0:03.46 httpd
15075 apache 16 0 30640 15m 3416 R 8.0 0.8 0:17.79 httpd
15935 apache 16 0 29724 14m 3248 R 8.0 0.7 0:01.38 httpd
15933 apache 16 0 29212 14m 3492 S 7.3 0.7 0:01.42 httpd
14889 apache 16 0 30240 15m 4008 S 7.0 0.8 0:22.37 httpd
15120 apache 16 0 29808 15m 4472 R 7.0 0.8 0:16.10 httpd
14818 apache 16 0 29736 15m 4352 R 6.4 0.8 0:27.61 httpd
14829 apache 16 0 31180 16m 4052 S 6.4 0.8 0:24.71 httpd
15080 apache 15 0 29776 14m 3924 S 6.4 0.7 0:17.10 httpd