barbalex opened a new issue #1088: cpu usage 100% caused by silence and 
fs-manager
URL: https://github.com/apache/couchdb/issues/1088
 
 
   ## Expected Behavior
   Usually CPU usage should be below 10%.
   
   ## Current Behavior
   CPU usage is at 100% 95% of the time.
   
   On 5 different production servers I have noticed that cpu usage has been at 
100% for most of the time during at least the last 30 days.
   
   From running `top` it seems that most often Silence is the main culprit, 
using 98% of the cpu. Sometimes `fs-manager` and `Silence` both use 49% each. 
And on one server it seems that `fs-manager` uses 98%.
   
   There are no active tasks running.
   
   Two of these servers couches contain very low number of docs (a few 
hundred). The others have about 30'000 docs.
   
   What could cause this behaviour?
   How problematic is it?
   How can I prevent it?
   
   ## Your Environment
   <!--- Include as many relevant details about the environment you experienced 
the bug in -->
   * Version used: 1.6.1
   * Operating System and version (desktop or mobile): ubuntu 14.04, ubuntu 
16.04.02
   * Link to your project: https://github.com/FNSKtZH/artendb_v1, 
https://github.com/barbalex/bb2, https://github.com/barbalex/brexit
   
![ae_top](https://user-images.githubusercontent.com/669783/34561395-076e4886-f14a-11e7-8dec-441ad96975d4.jpg)
   
![artdaten_top](https://user-images.githubusercontent.com/669783/34561396-0789414a-f14a-11e7-843b-f97e6282d8a7.jpg)
   
![bb_top](https://user-images.githubusercontent.com/669783/34561397-07a46fba-f14a-11e7-9028-74b35a9432b4.jpg)
   
![brexit_top](https://user-images.githubusercontent.com/669783/34561398-07c2f368-f14a-11e7-84db-d5dcdd995725.jpg)
   

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