[Bro] Manager swapping..

fatema bannatwala fatema.bannatwala at gmail.com
Wed Mar 22 08:05:24 PDT 2017

Hey all,

We have logger and manager running on the same node, and it started to use
complete swap and bro logs in current dir stopped rotating.

We have run in this type of issue before when running Bro2.4, and it turned
out that moving proxies to the worker nodes solved the high load issue on
manager, and things started working normally.

Now, we have all the proxies on the worker nodes (4 in total) and logger is
running on the same node as manager, so my guess would be, that might be
causing the high load on manager.

The bro processes are really big on the manager:

104772 bro       20   0 24.926g 0.017t   1300 S  45.7 25.0   4542:04 bro
125346 bro       20   0  0.221t 0.027t   3444 S  40.4 39.4 187:28.80 bro
125366 bro       25   5 1510856 275516    728 R  40.1  0.4 222:22.58 bro
104776 bro       25   5  540736 228920    360 S   8.9  0.3 893:42.05 bro

Also, the free -g output looks like this:
$ free -g
              total        used        free      shared  buff/cache
Mem:             70          47           0           0          22
Swap:             7           7           0

Next thing I am going to try is to disable some of the protocols from
logging (don't know how much help it would be) and restart Bro.

Any other suggestions/Best practices to follow, to avoid this situation in
future (really not looking forward to the quick and dirty fix of restarting
Bro whenever this happens :) )?

Also, I have proper ethtool settings (tso off gso off gro off rx off tx off
sg off) on the manager as well (as suggested in some of the posts for
better performance).

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