Cost of single-threaded nmethod hotness updates at each safepoint (in JDK 8)

Bernd Eckenfels ecki at
Fri Jul 31 21:44:45 UTC 2015

Am Fri, 31 Jul 2015 12:07:18 -0700
schrieb Srinivas Ramakrishna <ysr1729 at>:

> Notice that the code cache usage is less that 35 MB, for the 240 MB
> capacity, yet it seems we have had 58 sweeps already

I would also be interested in what causes this. Is this caused by
System.gc maybe? (we do see sweeps and decreasing code cache usage on
systems where no pressure should exist).


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