我注意到，我的网站今天下降，当我进入我的箱子，跑到top ，我注意到，我的服务器负载超高。 我迅速closures了apache并等待直到负载下降，但是一旦我启动apache备份负载并且进程开始非常迅速地爬升。 该网站是一个基本的WordPress博客。
这是top的输出
top - 15:24:50 up 11:19, 1 user, load average: 29.76, 24.04, 19.27 Tasks: 129 total, 33 running, 96 sleeping, 0 stopped, 0 zombie %Cpu(s): 30.5 us, 2.8 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 66.8 st KiB Mem: 2048448 total, 1092188 used, 956260 free, 162896 buffers KiB Swap: 1048572 total, 0 used, 1048572 free. 397860 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1061 mysql 20 0 897664 111416 7784 S 4.3 5.4 13:56.63 mysqld 7205 ubuntu 20 0 406700 38676 23276 R 3.6 1.9 0:20.75 apache2 7273 ubuntu 20 0 406840 41928 26636 R 3.6 2.0 0:13.05 apache2 7137 ubuntu 20 0 407284 39664 23872 R 3.3 1.9 0:30.87 apache2 7196 ubuntu 20 0 407208 40160 24464 R 3.3 2.0 0:21.61 apache2 7202 ubuntu 20 0 406796 38720 23168 R 3.3 1.9 0:21.10 apache2 7203 ubuntu 20 0 407576 42880 26596 R 3.3 2.1 0:20.74 apache2 7218 ubuntu 20 0 406040 38772 24004 R 3.3 1.9 0:18.09 apache2 7219 ubuntu 20 0 406952 39360 23744 R 3.3 1.9 0:18.09 apache2 7222 ubuntu 20 0 406804 38420 23128 R 3.3 1.9 0:17.48 apache2 7228 ubuntu 20 0 402540 36764 25320 R 3.3 1.8 0:17.75 apache2 7244 ubuntu 20 0 407060 38652 23096 R 3.3 1.9 0:16.10 apache2 7245 ubuntu 20 0 407052 38764 23220 R 3.3 1.9 0:15.67 apache2 7252 ubuntu 20 0 406736 39336 23944 R 3.3 1.9 0:15.70 apache2 7254 ubuntu 20 0 407316 39552 23712 R 3.3 1.9 0:14.81 apache2 7256 ubuntu 20 0 407264 40444 24748 R 3.3 2.0 0:14.41 apache2 7260 ubuntu 20 0 406544 38948 23908 R 3.3 1.9 0:15.01 apache2
以下是当时连接IP的数量：
netstat -ntu | grep ESTAB | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr 2 75.112.** 1 54.251.** 1 54.245.** 1 54.232.** 1 54.228.**
这是我的硬件信息
description: Computer product: HVM domU () vendor: Xen version: 4.2.amazon serial: ** width: 64 bits capabilities: smbios-2.4 dmi-2.4 ldt16 vsyscall32 configuration: boot=normal uuid=** *-core description: Motherboard physical id: 0 *-firmware:0 description: BIOS vendor: Xen physical id: 0 version: 4.2.amazon date: 12/03/2014 size: 96KiB capabilities: pci edd *-cpu:0 description: CPU product: Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz vendor: Intel Corp. physical id: 1 bus info: cpu@0 slot: CPU 1 size: 2500MHz capacity: 2500MHz width: 64 bits capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp x86-64 constant_tsc rep_good nopl xtopology eagerfpu pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm xsaveopt fsgsbase smep erms *-memory:0 description: System Memory physical id: 2 capacity: 2GiB *-bank:0 description: DIMM RAM physical id: 0 slot: DIMM 0 size: 2GiB width: 64 bits *-bank:1 description: DIMM RAM physical id: 1 slot: DIMM 0 size: 2GiB width: 64 bits *-firmware:1 description: BIOS vendor: Xen physical id: 3 version: 4.2.amazon date: 12/03/2014 size: 96KiB capabilities: pci edd *-cpu:1 description: CPU vendor: Intel physical id: 4 bus info: cpu@1 slot: CPU 1 size: 2500MHz capacity: 2500MHz *-memory:1 description: System Memory physical id: 5 capacity: 2GiB *-memory:2 UNCLAIMED physical id: 6 *-memory:3 UNCLAIMED physical id: 7 *-pci description: Host bridge product: 440FX - 82441FX PMC [Natoma] vendor: Intel Corporation physical id: 100 bus info: pci@0000:00:00.0 version: 02 width: 32 bits clock: 33MHz *-isa description: ISA bridge product: 82371SB PIIX3 ISA [Natoma/Triton II] vendor: Intel Corporation physical id: 1 bus info: pci@0000:00:01.0 version: 00 width: 32 bits clock: 33MHz capabilities: isa bus_master configuration: latency=0 *-ide description: IDE interface product: 82371SB PIIX3 IDE [Natoma/Triton II] vendor: Intel Corporation physical id: 1.1 bus info: pci@0000:00:01.1 version: 00 width: 32 bits clock: 33MHz capabilities: ide bus_master configuration: driver=ata_piix latency=64 resources: irq:0 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:c100(size=16) *-bridge UNCLAIMED description: Bridge product: 82371AB/EB/MB PIIX4 ACPI vendor: Intel Corporation physical id: 1.3 bus info: pci@0000:00:01.3 version: 01 width: 32 bits clock: 33MHz capabilities: bridge bus_master configuration: latency=0 *-display UNCLAIMED description: VGA compatible controller product: GD 5446 vendor: Cirrus Logic physical id: 2 bus info: pci@0000:00:02.0 version: 00 width: 32 bits clock: 33MHz capabilities: vga_controller bus_master configuration: latency=0 resources: memory:f0000000-f1ffffff memory:f3000000-f3000fff *-generic description: Unassigned class product: Xen Platform Device vendor: XenSource, Inc. physical id: 3 bus info: pci@0000:00:03.0 version: 01 width: 32 bits clock: 33MHz capabilities: bus_master configuration: driver=xen-platform-pci latency=0 resources: irq:28 ioport:c000(size=256) memory:f2000000-f2ffffff *-network description: Ethernet interface physical id: 1 logical name: eth0 serial: ** capabilities: ethernet physical configuration: broadcast=yes driver=vif ip=*** link=yes multicast=yes
任何关于如何进一步debugging的build议？
编辑：
我想我也会添加这个。 根据@nochkin的build议，我把MaxClients从30降到了10，负载降到了8.0左右。
<IfModule mpm_prefork_module> StartServers 3 MinSpareServers 3 MaxSpareServers 5 MaxClients 10 MaxRequestsPerChild 0 </IfModule>
你需要调整你开始的subprocess的数量。 根据您的configuration，可能位于httpd-mpm.conf或httpd.conf文件中。