Review request for 5049299

Florian Weimer fweimer at
Fri May 29 10:58:56 UTC 2009

* Andrew Haley:

>> Well, I thought -Xms means that.  An untuned VM is not expected to hit
>> the -Xmx limit.  At least this is what I see in practice, and to me
>> this is the distinction expressed between the -Xmx and -Xms flags.
> I am very sorry, "-Xmx" was a typo, or perhaps a thinko.  In my original
> posting -- which was trimmed -- I said

Oops, sorry.

>> It makes more sense to allocate all the -Xms size immediately.
> and I thought you were disagreeing with me, but:

I tried to explain that, currently, the whole heap is reserved.  I
think we agree that it makes sense to reserve just the -Xms portion,
and leave the rest at PROT_NONE (or whatever mechanism the kernel
developers recommend).

Florian Weimer                <fweimer at>
BFK edv-consulting GmbH
Kriegsstraße 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99

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