Ralf,

I see this feature adds a lot of code. In fact, I'm not sure, it is worth to add this kind of complexity (including new compressing threads) into the VM implementation. What is a real use case behind it? Could this compressing be done separately from VM implementation?

Thanks,
Serguei


On 2/11/20 11:41 AM, serguei.spit...@oracle.com wrote:
Hi Ralf,

I'd suggest for the option format something like this:
  -gz[=level]

where level is an int. The part [=level] is optional.
The level is 0 by default (if it is not set).

Thanks,
Serguei

On 2/11/20 7:35 AM, Schmelter, Ralf wrote:
Hi Yasumasa,

I think I've tried too much by using the -gz flag as a boolean plus a int value. I've decided to use two options instead: -gz as a boolean option to turn compression on and -gz-level to specify the compression level. E.g.
GC.heap_dump -gz -gz-level=3 test.hprof.gz

Best regards,
Ralf


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