As I understand, the size of the virtual memory that a process uses is listed as "total-vm". Part of it is really mapped into the RAM itself (allocated and used). This is "RSS". Part of the RSS is allocated in real memory blocks (other than mapped into a file or device). This ...
Mar 15 14:58:52 localhost kernel: Out of memory: Kill process 25813 (java) score 757 or sacrifice child Mar 15 14:58:52 localhost kernel: Killed process 23697 (sh), UID 0, total-vm:113284kB, anon-rss:184kB, file-rss:0kB, shmem-rss:0kB Mar 15 14:58:52 localhost kernel: Spring ...
(1) 查找/proc/sys/vm/panic_on_oom设置,如果值为2,引起Kernel Panic内核恐慌则会停止掉所有进程10s自动重启系统;一般默认为0。 (2) 判断/proc/sys/vm/oom_kill_allocating_task设置:为1,直接将当前进程杀死,默认为0。 (3) 获取/proc/sys/vm/overcommit_memory中的配置的值: 如果值为2,直接将当前进程杀...
找到OOM的root cause,例如dump系统中所有的用户空间进程关于内存方面的一些信息,包括:进程标识信息、该进程使用的total virtual memory信息、该进程实际使用物理内存(我们又称之为RSS,Resident Set Size,不仅仅是自己程序使用的物理内存,也包含共享库占用的内存),该进程的页表信息等等。
Jul 18 14:38:44 izbp764664httdtdff11wtycz kernel: [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name Jul 18 14:38:44 izbp764664httdtdff11wtycz kernel: [ 336] 0 336 22802 104 50 0 0 systemd-journal Jul 18 14:38:44 izbp764664httdtdff11wtycz kernel: [ 359] ...
total-vm就是进程使用的虚拟内存大小,其中部分内容映射到RAM本身,也就是主存,被分配和使用也就成了RSS。 部分RSS在实际内存块里面分配,成了anon-rss,叫做匿名内存。还有映射到设备和文件的RSS内存卡,叫做file-rss。 比如说: 你用vim指令打开一个巨大的文件,那么file-rss将会很高。
[Thu Jun 10 01:03:18 2021] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name [Thu Jun 10 01:03:18 2021] [ 3121] 0 3121 955 245 65536 0 -998 pause [Thu Jun 10 01:03:18 2021] [ 49498] 0 49498 4528 82 86016 0 -998 test.sh ...
killed process8398,UID505,(java)total-vm:2572232kB,anno-rss:1431292kB,file-rss:908kB oom killer是linux系统的一个保护进程,当linux系统所剩的内存空间不足以满足系统正常运行时,会触发。oomkiller执行时,会找出系统所有线程的score值最高的那个pid,然后干掉。 这里我们可以看到,JAVA进程的确是被LINUX的oom ...
[11686.043253] [ pid ] uid tgid total_vm rss cpu oom_adj oom_score_adj name [11686.043266] [ 1084] 0 1084 662 1 0 0 0 upstart-udev-br [11686.043271] [ 1094] 0 1094 743 79 0 -17 -1000 udevd [11686.043276] [ 1104] 101 1104 7232 42 0 0 0 rsyslogd ...
[Fri Mar 13 18:46:44 2020]Outofmemory:Killprocess28258 (nginx)score30orsacrificechild[Fri Mar 13 18:46:44 2020]Killedprocess28258 (nginx)total-vm:1092198764kB,anon-rss:3943668kB,file-rss:736kB,shmem-rss:4kB work 进程重启后,大量长连接断连,压测就没法继续增加数据量。