From: "Dan Maas" <dmaas@dcine.com>
To: <adam-dated-1007982419.3acea7@flounder.net>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: Maximum heap size?
Date: Wed, 5 Dec 2001 15:34:54 -0500 [thread overview]
Message-ID: <03c201c17dcc$4e14c930$1a01a8c0@allyourbase> (raw)
In-Reply-To: <fa.g60uruv.1n5cija@ifi.uio.no> <fa.h8gf0vv.18kimh8@ifi.uio.no>
> If you are hitting a 1GB limit I would assume the jvm isn't very bright
> about its allocation of resources. You should run out at something like
> 2.5Gb of allocations. (you lose some to app and library maps)
Specifically, the jvm is probably getting memory from brk(), because brk()
only operates in the ~1GB region between 0x08000000 + epsilon (where the
executable ends) and 0x40000000 (where shared libs begin). The easiest way
to get more than 1GB is to mmap() anonymous pages (which will come from the
remaining ~2GB region between 0x40000000 and 0xBFFFFFFF). e.g. glibc will
use anonymous mmap() to fulfill large malloc() requests.
Regards,
Dan
next parent reply other threads:[~2001-12-05 20:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.g60uruv.1n5cija@ifi.uio.no>
[not found] ` <fa.h8gf0vv.18kimh8@ifi.uio.no>
2001-12-05 20:34 ` Dan Maas [this message]
2001-12-05 11:06 Maximum heap size? Adam McKenna
2001-12-05 11:26 ` Alan Cox
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='03c201c17dcc$4e14c930$1a01a8c0@allyourbase' \
--to=dmaas@dcine.com \
--cc=adam-dated-1007982419.3acea7@flounder.net \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.