Heh believe it or not once again I got an OOM error! And it's becomes really 
'funny' that it happens at the same time? Look at this:

Oct 17 20:04:11 node1 kernel: kthreadd invoked oom-killer: gfp_mask=0x3000d0, 
order=2, oom_score_adj=0

When I look at InfluxDB log I see this:

Oct 17 20:03:29 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:03:29 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 0252f60c-9494-11e6-b227-000000000000 239168
Oct 17 20:03:33 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:03:32 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 044496f0-9494-11e6-b228-000000000000 198616
Oct 17 20:03:36 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:03:36 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 0655bab6-9494-11e6-b229-000000000000 141794
Oct 17 20:03:36 node1 influxd: [tsm1] 2016/10/17 20:03:36 Compacting cache for 
/var/lib/influxdb/data/macdb/seven_days/579
Oct 17 20:03:37 node1 influxd: [continuous_querier] 2016/10/17 20:03:37 
finished continuous query cq_30m (2016-10-17 19:30:00 +0200 CEST to 2016-10-17 
20
:00:00 +0200 CEST) in 3m37.079684067s
Oct 17 20:03:38 node1 influxd: [tsm1] 2016/10/17 20:03:38 Compacting cache for 
/var/lib/influxdb/data/macdb/three_months/575
Oct 17 20:03:38 node1 influxd: [tsm1] 2016/10/17 20:03:38 Snapshot for path 
/var/lib/influxdb/data/macdb/seven_days/579 deduplicated in 368.123875m
s
Oct 17 20:03:40 node1 influxd: [tsm1] 2016/10/17 20:03:40 Snapshot for path 
/var/lib/influxdb/data/macdb/three_months/575 deduplicated in 485.55333
4ms
Oct 17 20:04:02 node1 influxd: [tsm1wal] 2016/10/17 20:04:02 Removing 
/var/lib/influxdb/wal/macdb/seven_days/579/_01024.wal
Oct 17 20:04:02 node1 influxd: [tsm1wal] 2016/10/17 20:04:02 Removing 
/var/lib/influxdb/wal/macdb/seven_days/579/_01025.wal
Oct 17 20:04:02 node1 influxd: [tsm1wal] 2016/10/17 20:04:02 Removing 
/var/lib/influxdb/wal/macdb/seven_days/579/_01026.wal
Oct 17 20:04:02 node1 influxd: [tsm1] 2016/10/17 20:04:02 Snapshot for path 
/var/lib/influxdb/data/macdb/seven_days/579 written in 25.602303689s
Oct 17 20:04:02 node1 influxd: [tsm1] 2016/10/17 20:04:02 beginning level 1 
compaction of group 0, 2 TSM files
Oct 17 20:04:02 node1 influxd: [tsm1] 2016/10/17 20:04:02 compacting level 1 
group (0) /var/lib/influxdb/data/macdb/seven_days/579/000000359-000000
001.tsm (#0)
Oct 17 20:04:03 node1 influxd: [tsm1] 2016/10/17 20:04:02 compacting level 1 
group (0) /var/lib/influxdb/data/macdb/seven_days/579/000000360-000000
001.tsm (#1)
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616a065-9494-11e6-b22f-000000000000 152030
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 161979a7-9494-11e6-b238-000000000000 133364
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 16169ee0-9494-11e6-b22b-000000000000 152118
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616a01c-9494-11e6-b22e-000000000000 153616
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616a070-9494-11e6-b230-000000000000 153639
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 16169f73-9494-11e6-b22c-000000000000 153690
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 16169f73-9494-11e6-b22c-000000000000 153690
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616d89c-9494-11e6-b237-000000000000 152262
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 16169fb1-9494-11e6-b22d-000000000000 153706
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616c37e-9494-11e6-b234-000000000000 152707
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616cbfb-9494-11e6-b235-000000000000 152636
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616cc3e-9494-11e6-b236-000000000000 152641
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616c2eb-9494-11e6-b233-000000000000 153000
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616a080-9494-11e6-b231-000000000000 153896
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 1616a0a7-9494-11e6-b232-000000000000 153927
Oct 17 20:04:03 node1 influxd: [httpd] 192.168.11.24 - writter 
[17/Oct/2016:20:04:02 +0200] "POST /write?db=macdb&precision=s HTTP/1.1" 204 0 
"-" "-" 16169e92-9494-11e6-b22a-000000000000 153946
Oct 17 20:04:11 node1 kernel: kthreadd invoked oom-killer: gfp_mask=0x3000d0, 
order=2, oom_score_adj=0
Oct 17 20:04:11 node1 kernel: kthreadd cpuset=/ mems_allowed=0

Why it happens always at the same time? I don't have any cron jobs nor any 
strange traffic patterns at this time.

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