[SERVER-23614] High CPU Load on Idle/Prod Server Created: 07/Apr/16 Updated: 13/Apr/16 Resolved: 13/Apr/16 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Bodenhaltung [X] | Assignee: | Kelsey Schubert |
| Resolution: | Duplicate | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Environment: |
Gentoo, Kernel 4.1.14. |
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| Attachments: |
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| Issue Links: |
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| Operating System: | ALL | ||||||||
| Participants: | |||||||||
| Description |
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Hi, i have a fresh mongodb-3.2 running and a idle load from 1.x. With a replset and live traffic the load increase to 4-5. strace output:
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| Comments |
| Comment by Kelsey Schubert [ 13/Apr/16 ] | ||
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Hi Bodenhaltung, Thank you for the clarification. From your description, I believe the issue that you are observing is tracked in Kind regards, | ||
| Comment by Bodenhaltung [X] [ 12/Apr/16 ] | ||
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Hi,
Yes, i can confirm.
Yes, i can confirm, the issue is persists with the tarball mongod. I can give you access on this machine, just send me your ssh key. I have to correct me, the cpu load seems to be ok, but the load average is rising and with strace the mongod does not looking good. | ||
| Comment by Kelsey Schubert [ 12/Apr/16 ] | ||
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Hi Bodenhaltung, I examined the iostat.log that you uploaded. It indicates that there was no CPU load while the data was being collected. Can you please confirm that you were experiencing this issue while you were collecting these stats? Also, I noticed in your logs that you are using a debug build, can you please install MongoDB from Tarball and confirm the issue persists? Thank you, | ||
| Comment by Bodenhaltung [X] [ 09/Apr/16 ] | ||
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Hi,
Ok, please see attached, i hope this will help. Best Regards, | ||
| Comment by Kelsey Schubert [ 08/Apr/16 ] | ||
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Hi Bodenhaltung, Thank you for reporting this issue. To get a better idea of what is going on here, can you please execute the following shell script:
This will collect iostat data each second, and will help us to correlate the CPU numbers to events recorded in the diagnostic.data. After running this script for a day, please upload the following information:
Thank you, |