N次请求
tomcat conf/server.xml
https://blog.csdn.net/qq_30121245/article/details/52861935
pattern分析
%a 这是记录访问者的IP，在日志里是127.0.0.1 %A 这是记录本地服务器的IP，在日志里是192.168.254.108 %b 发送信息的字节数，不包括http头，如果字节数为0的话，显示为- %B 发送信息的字节数，不包括http头。 %h 服务器的名称。如果resolveHosts为false的话，这里就是IP地址了，例如我的日志里是10.217.14.16 %H 访问者的协议，这里是HTTP/1.0 %l 官方解释：Remote logical username from identd (可能这样翻译：记录浏览者进行身份验证时提供的名字)(always returns '-') %m 访问的方式，是GET还是POST %p 本地接收访问的端口 %q 比如你访问的是aaa.jsp?bbb=ccc，那么这里就显示?bbb=ccc，就是querystring的意思 %r First line of the request (method and request URI) 请求的方法和URL %s http的响应状态码 %S 用户的session ID,这个session ID大家可以另外查一下详细的解释，反正每次都会生成不同的session ID %t 请求时间 %u 得到了验证的访问者，否则就是"-" %U 访问的URL地址，我这里是/rightmainima/leftbott4.swf %v 服务器名称，可能就是你url里面写的那个吧，我这里是localhost %D Time taken to process the request,in millis，请求消耗的时间，以毫秒记 %T Time taken to process the request,in seconds，请求消耗的时间，以秒记
内存溢出
/var/log/message查看
Jul 3 21:35:01 VM_0_15_centos systemd: Starting Session 158959 of user root. Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff816a3d91>] dump_stack+0x19/0x1b Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff81185e3d>] ? oom_unkillable_task+0xcd/0x120 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff8118cd85>] __alloc_pages_nodemask+0x405/0x420 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff811d1108>] alloc_pages_current+0x98/0x110 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff81182917>] __page_cache_alloc+0x97/0xb0 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff81184eb0>] filemap_fault+0x170/0x410 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffffc01b8156>] ext4_filemap_fault+0x36/0x50 [ext4] Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff811ad162>] __do_fault+0x52/0xe0 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff811ad60b>] do_read_fault.isra.44+0x4b/0x130 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff811b1f11>] handle_mm_fault+0x691/0xfa0 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff816a84c7>] ? do_nanosleep+0xa7/0xf0 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff816affb4>] __do_page_fault+0x154/0x450 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff816b02e5>] do_page_fault+0x35/0x90 Jul 3 21:35:30 VM_0_15_centos kernel: [<ffffffff816ac508>] page_fault+0x28/0x30 Jul 3 21:35:30 VM_0_15_centos kernel: Mem-Info: Jul 3 21:35:30 VM_0_15_centos kernel: lowmem_reserve[]: 0 975 975 975 Jul 3 21:35:30 VM_0_15_centos kernel: lowmem_reserve[]: 0 0 0 0 Jul 3 21:35:30 VM_0_15_centos kernel: Node 0 DMA: 32*4kB (UE) 43*8kB (UE) 30*16kB (UEM) 20*32kB (UE) 9*64kB (UEM) 3*128kB (UEM) 4*256kB (UEM) 2*512kB (U) 0*1024kB 0*2048kB 0*4096kB = 4600kB Jul 3 21:35:30 VM_0_15_centos kernel: Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Jul 3 21:35:30 VM_0_15_centos kernel: 4854 total pagecache pages Jul 3 21:35:30 VM_0_15_centos kernel: 0 pages in swap cache Jul 3 21:35:30 VM_0_15_centos kernel: Swap cache stats: add 0, delete 0, find 0/0 Jul 3 21:35:30 VM_0_15_centos kernel: Free swap = 0kB Jul 3 21:35:30 VM_0_15_centos kernel: Total swap = 0kB Jul 3 21:35:30 VM_0_15_centos kernel: 262044 pages RAM Jul 3 21:35:30 VM_0_15_centos kernel: 0 pages HighMem/MovableOnly Jul 3 21:35:30 VM_0_15_centos kernel: 7972 pages reserved Jul 3 21:35:30 VM_0_15_centos kernel: [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name Jul 3 21:35:30 VM_0_15_centos kernel: [ 335] 0 335 19545 179 41 0 0 systemd-journal Jul 3 21:35:30 VM_0_15_centos kernel: [ 356] 0 356 29712 84 27 0 0 lvmetad Jul 3 21:35:30 VM_0_15_centos kernel: [ 362] 0 362 10955 132 23 0 -1000 systemd-udevd Jul 3 21:35:30 VM_0_15_centos kernel: [ 441] 0 441 13863 113 27 0 -1000 auditd Jul 3 21:35:30 VM_0_15_centos kernel: [ 473] 0 473 6084 151 16 0 0 systemd-logind Jul 3 21:35:30 VM_0_15_centos kernel: [ 474] 81 474 6659 125 18 0 -900 dbus-daemon Jul 3 21:35:30 VM_0_15_centos kernel: [ 475] 0 475 1085 35 7 0 0 acpid Jul 3 21:35:30 VM_0_15_centos kernel: [ 476] 998 476 2133 36 10 0 0 lsmd Jul 3 21:35:30 VM_0_15_centos kernel: [ 478] 999 478 134053 2157 57 0 0 polkitd Jul 3 21:35:30 VM_0_15_centos kernel: [ 479] 0 479 178540 433 181 0 0 rsyslogd Jul 3 21:35:30 VM_0_15_centos kernel: [ 764] 0 764 6464 52 18 0 0 atd Jul 3 21:35:30 VM_0_15_centos kernel: [ 765] 0 765 31566 201 19 0 0 crond Jul 3 21:35:30 VM_0_15_centos kernel: [ 818] 0 818 28343 3124 53 0 0 dhclient Jul 3 21:35:30 VM_0_15_centos kernel: [ 885] 0 885 141129 2730 96 0 0 tuned Jul 3 21:35:30 VM_0_15_centos kernel: [ 896] 0 896 27511 32 9 0 0 agetty Jul 3 21:35:30 VM_0_15_centos kernel: [ 897] 0 897 27511 32 12 0 0 agetty Jul 3 21:35:30 VM_0_15_centos kernel: [ 940] 0 940 26499 245 53 0 -1000 sshd Jul 3 21:35:30 VM_0_15_centos kernel: [ 990] 38 990 7994 184 22 0 0 ntpd Jul 3 21:35:30 VM_0_15_centos kernel: [ 1302] 0 1302 25171 108 19 0 0 YDLive Jul 3 21:35:30 VM_0_15_centos kernel: [ 1369] 0 1369 376850 1656 145 0 0 YDService Jul 3 21:35:30 VM_0_15_centos kernel: [27523] 32 27523 16255 170 35 0 0 rpcbind Jul 3 21:35:30 VM_0_15_centos kernel: [ 6775] 0 6775 30927 730 62 0 0 nginx Jul 3 21:35:30 VM_0_15_centos kernel: [28373] 996 28373 31564 959 63 0 0 nginx Jul 3 21:35:30 VM_0_15_centos kernel: [ 1970] 0 1970 579444 48524 153 0 0 java Jul 3 21:35:30 VM_0_15_centos kernel: [ 6071] 0 6071 39351 1670 31 0 0 barad_agent Jul 3 21:35:30 VM_0_15_centos kernel: [ 6078] 0 6078 45425 2002 43 0 0 barad_agent Jul 3 21:35:30 VM_0_15_centos kernel: [ 6079] 0 6079 152605 2716 48 0 0 barad_agent Jul 3 21:35:30 VM_0_15_centos kernel: [ 6397] 0 6397 24324 115 19 0 0 sgagent Jul 3 21:35:30 VM_0_15_centos kernel: [ 914] 0 914 672195 131050 500 0 0 java Jul 3 21:35:30 VM_0_15_centos kernel: [ 6625] 0 6625 36396 379 72 0 0 sshd Jul 3 21:35:30 VM_0_15_centos kernel: [ 6626] 74 6626 26499 274 53 0 0 sshd Jul 3 21:35:30 VM_0_15_centos kernel: [ 6639] 0 6639 95428 2672 75 0 0 python Jul 3 21:35:30 VM_0_15_centos kernel: [ 6645] 0 6645 25943 410 50 0 0 sshd Jul 3 21:35:30 VM_0_15_centos kernel: Out of memory: Kill process 914 (java) score 502 or sacrifice child Jul 3 21:35:30 VM_0_15_centos kernel: Killed process 914 (java) total-vm:2688780kB, anon-rss:524200kB, file-rss:0kB, shmem-rss:0kB Jul 3 21:35:31 VM_0_15_centos systemd-logind: Removed session 151212. Jul 3 21:36:01 VM_0_15_centos systemd: Started Session 158960 of user root.