Hi All,
I am having issues with my containers mostly using up all VM memory (32Gb RAM), even though I have set the limit to 16gb in the containers. 3 of the containers (each with tomcat) connect to a Postgres container, the web applications in each of those 3 containers start of well, but then start experiencing oom errors, thus failing. Please help, below are the logs.
/var/log/kern.log:Jul 15 15:38:50 DHIS2devVM kernel: [ 2542.490039] java.d invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:38:50 DHIS2devVM kernel: [ 2542.490058] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:38:50 DHIS2devVM kernel: [ 2542.490471] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/user/root/0,task=java.d,pid=27440,uid=0
/var/log/kern.log:Jul 15 15:38:50 DHIS2devVM kernel: [ 2542.490499] Out of memory: Killed process 27440 (java.d) total-vm:2626936kB, anon-rss:594576kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:1340kB oom_score_adj:0
/var/log/kern.log:Jul 15 15:39:20 DHIS2devVM kernel: [ 2571.718189] lxc invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:39:20 DHIS2devVM kernel: [ 2571.718209] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:39:20 DHIS2devVM kernel: [ 2571.718621] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/lxc/dev/system.slice/tomcat9.service,task=java,pid=27746,uid=100997
/var/log/kern.log:Jul 15 15:39:20 DHIS2devVM kernel: [ 2571.718681] Out of memory: Killed process 27746 (java) total-vm:5315692kB, anon-rss:837324kB, file-rss:0kB, shmem-rss:0kB, UID:100997 pgtables:2008kB oom_score_adj:0
/var/log/kern.log:Jul 15 15:39:30 DHIS2devVM kernel: [ 2581.083685] munin-node invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:39:30 DHIS2devVM kernel: [ 2581.083705] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:39:31 DHIS2devVM kernel: [ 2581.084136] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/user/root/0,task=java.d,pid=9331,uid=0
/var/log/kern.log:Jul 15 15:39:31 DHIS2devVM kernel: [ 2581.084157] Out of memory: Killed process 9331 (java.d) total-vm:3031224kB, anon-rss:588kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:700kB oom_score_adj:0
/var/log/kern.log:Jul 15 15:39:37 DHIS2devVM kernel: [ 2587.665646] munin-node invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:39:37 DHIS2devVM kernel: [ 2587.665665] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:39:37 DHIS2devVM kernel: [ 2587.666064] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=postgres,mems_allowed=0,global_oom,task_memcg=/user/root/0,task=java.d,pid=27985,uid=0
/var/log/kern.log:Jul 15 15:39:37 DHIS2devVM kernel: [ 2587.666094] Out of memory: Killed process 27985 (java.d) total-vm:2626936kB, anon-rss:276784kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:880kB oom_score_adj:0
/var/log/kern.log:Jul 15 15:39:44 DHIS2devVM kernel: [ 2594.470712] munin-node invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:39:44 DHIS2devVM kernel: [ 2594.470730] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:39:44 DHIS2devVM kernel: [ 2594.471127] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=postgres,mems_allowed=0,global_oom,task_memcg=/lxc/dev/system.slice/tomcat9.service,task=java,pid=28147,uid=100997
/var/log/kern.log:Jul 15 15:39:44 DHIS2devVM kernel: [ 2594.471189] Out of memory: Killed process 28147 (java) total-vm:5313644kB, anon-rss:440148kB, file-rss:0kB, shmem-rss:0kB, UID:100997 pgtables:1368kB oom_score_adj:0
/var/log/kern.log:Jul 15 15:39:50 DHIS2devVM kernel: [ 2602.412215] java.d invoked oom-killer: gfp_mask=0x100dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:39:51 DHIS2devVM kernel: [ 2602.412235] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:39:51 DHIS2devVM kernel: [ 2602.412623] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/user/root/0,task=java.d,pid=28006,uid=0
/var/log/kern.log:Jul 15 15:39:51 DHIS2devVM kernel: [ 2602.412652] Out of memory: Killed process 28006 (java.d) total-vm:2626936kB, anon-rss:531680kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:1432kB oom_score_adj:0
/var/log/kern.log:Jul 15 15:40:34 DHIS2devVM kernel: [ 2645.905731] GUsbEventThread invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
/var/log/kern.log:Jul 15 15:40:34 DHIS2devVM kernel: [ 2645.905748] oom_kill_process+0xe6/0x120
/var/log/kern.log:Jul 15 15:40:34 DHIS2devVM kernel: [ 2645.906045] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=postgres,mems_allowed=0,global_oom,task_memcg=/lxc/dev/system.slice/tomcat9.service,task=java,pid=28234,uid=100997
/var/log/kern.log:Jul 15 15:40:34 DHIS2devVM kernel: [ 2645.906114] Out of memory: Killed process 28234 (java) total-vm:5315692kB, anon-rss:631528kB, file-rss:0kB, shmem-rss:0kB, UID:100997 pgtables:1824kB oom_score_adj:0
Binary file /var/log/kern.log matches
The Linux VMs free -m:
free -m
total used free shared buff/cache available
Mem: 32117 31737 262 0 117 53
Swap: 1023 1023 0
Whereas the container is as below:
sudo lxc exec dev – free -gh
total used free shared buff/cache available
Mem: 14Gi 111Mi 14Gi 0.0Ki 155Mi 14Gi
Swap: 1.0Gi 0B 1.0Gi
Thanks!