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High CPU usage on mongodb server when idle?
MongoDB Socket Exceptions when moving chunksMongoDB virtual memory usageMongoDB and datasets that don't fit in RAM no matter how hard you shoveMongoDB server crashed, showing the following errorMongoDB CPU usage in top is confusingserver load too high on mongodb serverMongoDB high CPU usageHow to get MongoDB server local time?MongoDB mongos memory usageMongoDB WiredTiger storage not using two CPU cores
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I'm getting strange usage numbers on MongoDB server when it is in almost idle state: http://pastebin.com/cKVyGMts (no queries) DB size is about 3.3 Gb.
I can see in mongodb.log that snapshotthread is eating too much CPU:
Wed Nov 28 19:02:14 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:18 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:22 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:26 [snapshotthread] cpu: elapsed:4000 writelock: 0%
And data from top confirms it: http://pastebin.com/d57ybpBJ (iotop shows that there are no high disk activity present).
I'm running high-cpu instance on EC2, mongo confing and startup information is here: http://pastebin.com/YZyyq0gc.
How I can disable snapshotting or what can cause such a high CPU usage?
mongodb
edited Apr 26 '17 at 12:44
Roald Nefs
31429
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
add a comment |
I'm getting strange usage numbers on MongoDB server when it is in almost idle state: http://pastebin.com/cKVyGMts (no queries) DB size is about 3.3 Gb.
I can see in mongodb.log that snapshotthread is eating too much CPU:
Wed Nov 28 19:02:14 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:18 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:22 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:26 [snapshotthread] cpu: elapsed:4000 writelock: 0%
And data from top confirms it: http://pastebin.com/d57ybpBJ (iotop shows that there are no high disk activity present).
I'm running high-cpu instance on EC2, mongo confing and startup information is here: http://pastebin.com/YZyyq0gc.
How I can disable snapshotting or what can cause such a high CPU usage?
mongodb
edited Apr 26 '17 at 12:44
Roald Nefs
31429
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
Whet version of MongoDB are you using?
– FINESEC
Nov 28 '12 at 15:12
db version v2.0.8 from 10gen repo Centos 6.2
– Andrei Mikhaltsov
Nov 28 '12 at 15:14
did you try turning off snapshotting? cpu = false or just comment out cpu=true. Also check this bug out: jira.mongodb.org/browse/SERVER-2114
– Asya Kamsky
Dec 5 '12 at 22:29
Thanks, turning off snaphotting didnt cause any effect. I've straced mongo and found that log is filled with select and setsockopts: select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout)
– Andrei Mikhaltsov
Dec 6 '12 at 10:11
How is "Cpu(s): 3.0%us, 1.0%sy, 0.0%ni, 95.5%id, 0.3%wa, 0.0%hi, 0.1%si, 0.0%st" high load? That's 95+% idle.
– David Schwartz
Dec 1 '15 at 6:31
add a comment |
I'm getting strange usage numbers on MongoDB server when it is in almost idle state: http://pastebin.com/cKVyGMts (no queries) DB size is about 3.3 Gb.
I can see in mongodb.log that snapshotthread is eating too much CPU:
Wed Nov 28 19:02:14 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:18 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:22 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:26 [snapshotthread] cpu: elapsed:4000 writelock: 0%
And data from top confirms it: http://pastebin.com/d57ybpBJ (iotop shows that there are no high disk activity present).
I'm running high-cpu instance on EC2, mongo confing and startup information is here: http://pastebin.com/YZyyq0gc.
How I can disable snapshotting or what can cause such a high CPU usage?
mongodb
edited Apr 26 '17 at 12:44
Roald Nefs
31429
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
I'm getting strange usage numbers on MongoDB server when it is in almost idle state: http://pastebin.com/cKVyGMts (no queries) DB size is about 3.3 Gb.
I can see in mongodb.log that snapshotthread is eating too much CPU:
Wed Nov 28 19:02:14 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:18 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:22 [snapshotthread] cpu: elapsed:4000 writelock: 0%
Wed Nov 28 19:02:26 [snapshotthread] cpu: elapsed:4000 writelock: 0%
And data from top confirms it: http://pastebin.com/d57ybpBJ (iotop shows that there are no high disk activity present).
I'm running high-cpu instance on EC2, mongo confing and startup information is here: http://pastebin.com/YZyyq0gc.
How I can disable snapshotting or what can cause such a high CPU usage?
mongodb
mongodb
edited Apr 26 '17 at 12:44
Roald Nefs
31429
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
edited Apr 26 '17 at 12:44
Roald Nefs
31429
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
edited Apr 26 '17 at 12:44
Roald Nefs
31429
edited Apr 26 '17 at 12:44
Roald Nefs
31429
edited Apr 26 '17 at 12:44
Roald Nefs
31429
31429
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
asked Nov 28 '12 at 15:06
Andrei MikhaltsovAndrei Mikhaltsov
2,34411729
2,34411729
Whet version of MongoDB are you using?
– FINESEC
Nov 28 '12 at 15:12
db version v2.0.8 from 10gen repo Centos 6.2
– Andrei Mikhaltsov
Nov 28 '12 at 15:14
did you try turning off snapshotting? cpu = false or just comment out cpu=true. Also check this bug out: jira.mongodb.org/browse/SERVER-2114
– Asya Kamsky
Dec 5 '12 at 22:29
Thanks, turning off snaphotting didnt cause any effect. I've straced mongo and found that log is filled with select and setsockopts: select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout)
– Andrei Mikhaltsov
Dec 6 '12 at 10:11
How is "Cpu(s): 3.0%us, 1.0%sy, 0.0%ni, 95.5%id, 0.3%wa, 0.0%hi, 0.1%si, 0.0%st" high load? That's 95+% idle.
– David Schwartz
Dec 1 '15 at 6:31
add a comment |
Whet version of MongoDB are you using?
– FINESEC
Nov 28 '12 at 15:12
db version v2.0.8 from 10gen repo Centos 6.2
– Andrei Mikhaltsov
Nov 28 '12 at 15:14
did you try turning off snapshotting? cpu = false or just comment out cpu=true. Also check this bug out: jira.mongodb.org/browse/SERVER-2114
– Asya Kamsky
Dec 5 '12 at 22:29
Thanks, turning off snaphotting didnt cause any effect. I've straced mongo and found that log is filled with select and setsockopts: select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout)
– Andrei Mikhaltsov
Dec 6 '12 at 10:11
How is "Cpu(s): 3.0%us, 1.0%sy, 0.0%ni, 95.5%id, 0.3%wa, 0.0%hi, 0.1%si, 0.0%st" high load? That's 95+% idle.
– David Schwartz
Dec 1 '15 at 6:31
Whet version of MongoDB are you using?
– FINESEC
Nov 28 '12 at 15:12
Whet version of MongoDB are you using?
– FINESEC
Nov 28 '12 at 15:12
db version v2.0.8 from 10gen repo Centos 6.2
– Andrei Mikhaltsov
Nov 28 '12 at 15:14
db version v2.0.8 from 10gen repo Centos 6.2
– Andrei Mikhaltsov
Nov 28 '12 at 15:14
did you try turning off snapshotting? cpu = false or just comment out cpu=true. Also check this bug out: jira.mongodb.org/browse/SERVER-2114
– Asya Kamsky
Dec 5 '12 at 22:29
did you try turning off snapshotting? cpu = false or just comment out cpu=true. Also check this bug out: jira.mongodb.org/browse/SERVER-2114
– Asya Kamsky
Dec 5 '12 at 22:29
Thanks, turning off snaphotting didnt cause any effect. I've straced mongo and found that log is filled with select and setsockopts: select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout)
– Andrei Mikhaltsov
Dec 6 '12 at 10:11
Thanks, turning off snaphotting didnt cause any effect. I've straced mongo and found that log is filled with select and setsockopts: select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout)
– Andrei Mikhaltsov
Dec 6 '12 at 10:11
How is "Cpu(s): 3.0%us, 1.0%sy, 0.0%ni, 95.5%id, 0.3%wa, 0.0%hi, 0.1%si, 0.0%st" high load? That's 95+% idle.
– David Schwartz
Dec 1 '15 at 6:31
How is "Cpu(s): 3.0%us, 1.0%sy, 0.0%ni, 95.5%id, 0.3%wa, 0.0%hi, 0.1%si, 0.0%st" high load? That's 95+% idle.
– David Schwartz
Dec 1 '15 at 6:31
add a comment |
1 Answer
1
active
oldest
votes
According to JIRA some changes where made to memory allocation algorithm in version 2.2.0, which possibly could fix this issue.
MongoDB high CPU usage, low disk IO, very slow response
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
|
show 2 more comments
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
According to JIRA some changes where made to memory allocation algorithm in version 2.2.0, which possibly could fix this issue.
MongoDB high CPU usage, low disk IO, very slow response
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
|
show 2 more comments
According to JIRA some changes where made to memory allocation algorithm in version 2.2.0, which possibly could fix this issue.
MongoDB high CPU usage, low disk IO, very slow response
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
|
show 2 more comments
According to JIRA some changes where made to memory allocation algorithm in version 2.2.0, which possibly could fix this issue.
MongoDB high CPU usage, low disk IO, very slow response
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
According to JIRA some changes where made to memory allocation algorithm in version 2.2.0, which possibly could fix this issue.
MongoDB high CPU usage, low disk IO, very slow response
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
answered Nov 28 '12 at 15:27
FINESECFINESEC
1,26178
1,26178
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
|
show 2 more comments
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
thank you for the answer!! unfortunately, this didn't work ;/ upgraded to db version v2.2.2, pdfile version 4.5 git version: d1b43b61a5308c4ad0679d34b262c5af9d664267
– Andrei Mikhaltsov
Nov 28 '12 at 15:54
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
ok, did you try to disable NUMA? mongodb.org/display/DOCS/NUMA
– FINESEC
Nov 28 '12 at 16:28
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
restarted server with command: numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf (cat /proc/sys/vm/zone_reclaim_mode 0 - no luck;/
– Andrei Mikhaltsov
Nov 28 '12 at 16:43
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
ok, try to increase syncdelay: docs.mongodb.org/manual/reference/mongod/…
– FINESEC
Nov 28 '12 at 17:20
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
no luck;/ i now think the problem is more OS specific pastebin.com/yaGL4cYm because i have 8 cores and mongod CPU usage is 2200% (!!!??) i'll try to update CentOS to the lastest version.
– Andrei Mikhaltsov
Nov 29 '12 at 10:22
|
show 2 more comments
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Whet version of MongoDB are you using?
– FINESEC
Nov 28 '12 at 15:12
db version v2.0.8 from 10gen repo Centos 6.2
– Andrei Mikhaltsov
Nov 28 '12 at 15:14
did you try turning off snapshotting? cpu = false or just comment out cpu=true. Also check this bug out: jira.mongodb.org/browse/SERVER-2114
– Asya Kamsky
Dec 5 '12 at 22:29
Thanks, turning off snaphotting didnt cause any effect. I've straced mongo and found that log is filled with select and setsockopts: select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout) select(10, [8 9], NULL, NULL, 0, 10000) = 0 (Timeout)
– Andrei Mikhaltsov
Dec 6 '12 at 10:11
How is "Cpu(s): 3.0%us, 1.0%sy, 0.0%ni, 95.5%id, 0.3%wa, 0.0%hi, 0.1%si, 0.0%st" high load? That's 95+% idle.
– David Schwartz
Dec 1 '15 at 6:31