[DOCS-2371] MongoDB and OS resources Created: 09/Dec/13  Updated: 11/Jan/17  Resolved: 27/Jul/16

Status: Closed
Project: Documentation
Component/s: manual
Affects Version/s: None
Fix Version/s: 01112017-cleanup

Type: Task Priority: Major - P3
Reporter: Alexander Komyagin Assignee: Unassigned
Resolution: Won't Fix Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

UNIX


Issue Links:
Related
Participants:
Days since reply: 7 years, 29 weeks ago

 Description   

Although we do not recommend running multiple active mongod/mongos instances within a single OS, a lot of people are still doing it.

On of the caveats is that this way you can run into OS resource limitations, that will affect mongod's in all the unpredictable ways.

We already documented ulimits, and we need to document kernel limits as well, and I suggest to mention it in Production Notes:

  • /proc/sys/kernel/pid_max # the value at which PIDs wrap around
  • /proc/sys/kernel/thread_max # limit on the total number of processes on the system
  • /proc/sys/fs/file-max # Maximum number of open files
  • /proc/sys/fs/file-nr # Will show the number of allocated, unused and max file descriptors. Helpful to estimate the risk of running into file-max limit.


 Comments   
Comment by Emily Hall [ 27/Jul/16 ]

Closed by Emily Hall for Housekeeping on 7/27/16.
Please create a new ticket if for prioritization.

Thank you!

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