Alex Parvulescu commented on OAK-4873:

I think we can use the estimation check as a way to reduce the frequency of 
compactions. if someone needs to test anything they are free to change the 
settings, otherwise running gc too often should be a cheap noop and estimation 
can provide this protection.

> Avoid running GC too frequently
> -------------------------------
>                 Key: OAK-4873
>                 URL: https://issues.apache.org/jira/browse/OAK-4873
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>    Affects Versions: Segment Tar 0.0.16
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: compaction, gc
>             Fix For: Segment Tar 0.0.16
> As {{RevisionGCMBean.startRevisionGC()}} can be used to manually invoke a gc 
> cycle, there is the danger of running into a {{SNFE}} when gc is run multiple 
> times in quick succession (due to the retention time being based on number of 
> generations). We should come up with a mechanism to prevent this scenario. 

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