RFR(S): 8226796: Reduce debug level logging for oopstorage+blocks

[Thomas Schatzl]

Hi,

On Thu, 2019-07-25 at 20:55 -0400, Kim Barrett wrote:
> Please review this adjustment to some of the logging levels in the
> OopStorage implementation, under the (oopstorage, blocks) tag
> sequence.  High volume logging statements have been reduced to trace
> level, and memory allocation failure has been raised to info.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8226796
> 
> Webrev:
> http://cr.openjdk.java.net/~kbarrett/8226796/open.00/
> Note: This webrev is baselined from the JDK-8228631 change that is
> also out for review.
> 
> Testing:
> mach5 tier1
> Local testing with various logging options and looked at output.
> 

  looks good. Note that I did not check whether the log level changes
make sense as I have no good grasp of what is important and what not in
this area, but the change itself seems good.

Thanks,
  Thomas