解决Apache child pid 22404 exit signal Segmentation fault (11)错误
新搭建的测试环境用的Apache/2.2.15，然后测试的时候，页面报502，最后查看Apache的log日志如下：
[Wed Jul 07 11:36:03 2016] [notice] child pid 22404 exit signal Segmentation fault (11) [Wed Jul 07 11:36:03 2016] [notice] child pid 22424 exit signal Segmentation fault (11) [Wed Jul 07 11:36:03 2016] [notice] child pid 22404 exit signal Segmentation fault (11) [Wed Jul 07 11:36:03 2016] [notice] child pid 22424 exit signal Segmentation fault (11)为了解决这个问题,网上搜了几个方法都无法解决,然后网上有人说是Apache的一个bug，是内存问题，最后我只能写个脚本处理。 1、检查服务器
[root@uweb1 atom]# cat /etc/issue CentOS release 6.5 (Final) Kernel \r on an \m [root@uweb1 atom]# uname -r 2.6.32-573.22.1.el6.x86_64
[root@uweb1 atom]# slabtop
Active / Total Objects (% used) : 262463 / 284128 (92.4%)
Active / Total Slabs (% used) : 18670 / 18670 (100.0%)
Active / Total Caches (% used) : 92 / 172 (53.5%)
Active / Total Size (% used) : 74471.91K / 77331.03K (96.3%)
Minimum / Average / Maximum Object : 0.02K / 0.27K / 4096.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
103452 103431 99% 0.10K 2796 37 11184K buffer_head
34000 33764 99% 0.98K 8500 4 34000K ext4_inode_cache
33240 33240 100% 0.19K 1662 20 6648K dentry
17024 16889 99% 0.03K 152 112 608K size-32
15323 7993 52% 0.05K 199 77 796K anon_vma_chain
13148 8203 62% 0.20K 692 19 2768K vm_area_struct
11151 9723 87% 0.06K 189 59 756K size-64
7616 7071 92% 0.55K 1088 7 4352K radix_tree_node
7261 7251 99% 0.07K 137 53 548K selinux_inode_security
6767 3720 54% 0.05K 101 67 404K anon_vma
6534 6527 99% 0.14K 242 27 968K sysfs_dir_cache
4404 4404 100% 0.58K 734 6 2936K inode_cache
3816 3767 98% 0.07K 72 53 288K Acpi-Operand
2580 1833 71% 0.12K 86 30 344K size-128
2400 1523 63% 0.25K 160 15 640K filp
2208 2199 99% 0.04K 24 92 96K Acpi-Namespace
2080 2008 96% 0.19K 104 20 416K size-192
1782 1782 100% 0.64K 297 6 1188K proc_inode_cache
756 744 98% 1.00K 189 4 756K size-1024
其实apache报[notice] child pid 1421 exit signal Segmentation fault (11),绝大部分是内存泄露的问题,网上的禁止proxy和cache模块,经过我试验没有效果,修改php内存也一样。
2、解决内存泄露脚本
#!/bin/bash time=`date` echo $time > /tmp/clear_cached.txt echo "total/used/free/shared/buffers/cached" >> /tmp/clear_cached.txt echo "Cleart Before" >> /tmp/clear_cached.txt free -m|grep Mem: >> /tmp/clear_cached.txt sync; echo 2 > /proc/sys/vm/drop_caches; echo 0 > /proc/sys/vm/drop_caches; echo "Clear After" >> /tmp/clear_cached.txt free -m|grep Mem: >> /tmp/clear_cached.txt
