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我有一个流量很大的在线游戏(150 万查询/小时)。该游戏是iphone上的回合制游戏。但是,服务器运行缓慢:

CPU:  92% user, 3% kernel, 0% IO, 5% idle
Real Memory:   15.71 GB total, 985.17 MB used

服务器统计:

Memory: 16 GB
Disk: 256GB SAS
Trafic:  2 * 1 Gbit 
CPU:    4 * 2Ghz

这些是我使用的设置:

ect/apache2/httpd.conf

Timeout 300
KeepAlive On
MaxKeepAliveRequests 500
KeepAliveTimeout 2

<IfModule mpm_prefork_module>
StartServers          5
MinSpareServers       10
MaxSpareServers      20
ServerLimit          2000
MaxClients           1900
MaxRequestsPerChild  1000

在 phpmyadmin 中,我有:

max connections = 2000

由于很多人同时玩,我发现通过增加最大连接数可以提高性能,但我不想将其设置为高,以免服务器崩溃。现在有 2000 个连接,CPU 为 92%(如上所述)。

我能做些什么来让它更快吗?
更多地增加 max_connections 是否安全?
为什么 CPU 这么高而 RAM 内存这么低?

提前致谢

编辑,来自 /proc/cpuinfo 的信息

    processor   : 0
vendor_id   : AuthenticAMD
cpu family  : 16
model       : 2
model name  : Quad-Core AMD Opteron(tm) Processor 8356
stepping    : 3
cpu MHz     : 2320.957
cache size  : 512 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 5
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow constant_tsc rep_good tsc_reliable nonstop_tsc pni cx16 popcnt hypervisor lahf_lm extapic abm sse4a misalignsse 3dnowprefetch
bogomips    : 4621.29
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor   : 1
vendor_id   : AuthenticAMD
cpu family  : 16
model       : 2
model name  : Quad-Core AMD Opteron(tm) Processor 8356
stepping    : 3
cpu MHz     : 2320.957
cache size  : 512 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 5
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow constant_tsc rep_good tsc_reliable nonstop_tsc pni cx16 popcnt hypervisor lahf_lm extapic abm sse4a misalignsse 3dnowprefetch
bogomips    : 4621.29
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor   : 2
vendor_id   : AuthenticAMD
cpu family  : 16
model       : 2
model name  : Quad-Core AMD Opteron(tm) Processor 8356
stepping    : 3
cpu MHz     : 2320.957
cache size  : 512 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 5
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow constant_tsc rep_good tsc_reliable nonstop_tsc pni cx16 popcnt hypervisor lahf_lm extapic abm sse4a misalignsse 3dnowprefetch
bogomips    : 4621.29
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

processor   : 3
vendor_id   : AuthenticAMD
cpu family  : 16
model       : 2
model name  : Quad-Core AMD Opteron(tm) Processor 8356
stepping    : 3
cpu MHz     : 2320.957
cache size  : 512 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 5
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow constant_tsc rep_good tsc_reliable nonstop_tsc pni cx16 popcnt hypervisor lahf_lm extapic abm sse4a misalignsse 3dnowprefetch
bogomips    : 4621.29
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:
4

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