Re: Working set bloat in Xcode 2
Re: Working set bloat in Xcode 2
- Subject: Re: Working set bloat in Xcode 2
- From: j o a r <email@hidden>
- Date: Wed, 25 May 2005 15:48:29 +0200
On 25 maj 2005, at 12.54, Nicko van Someren wrote:
Despite having 1GB in my laptop it is spending a great deal more
time thrashing the disk since moving to 10.4 and I'm wondering if
other people on this list have been experiencing the same with
their programs.
Are you sure that the disk activity you see are from VM paging?
Yes. My system is showing hardly any free memory. The Activity
Monitor tells me how many page ins and page outs the VM system has
performed and switching application causes these numbers to rise
dramatically (bringing up Dashboard for the first time in about 15
minutes needed over 2000 page-ins).
OK, well in that case; No, I don't see the problem you describe on my
machines.
Check paging statistics in top, and use Shark to find out more! As
always with performance problems - don't guess, measure! When you
guess you're almost always wrong!
Hey, if I was guessing I would have written "my lap top seems to be
spending", not "my laptop IS spending". The paging stats indicate
that this is not just some subjective assessment, despite the fact
that on a subjective level the machine has been running very slowly
since installing 10.4.
Oh, my! I forgot that you are perfect! Sorry, my mistake!
When it comes to your applications in particular, and not the
behaviour of Tiger in general, I'd suggest that you use top +
ObjectAlloc to check your apps on both Panther and Tiger and
compare the results. Try to use the same binary (use the Cross Dev
SDK) and have a predefined set of actions to be performed, to
ensure that you compare apples to apples.
I'll give ObjectAlloc another go but unfortunately now that I've
been sucked in by Apple's marketing I don't have easy access to a
machine running Panther any more! I don't have enough spare
hardware to keep machines hanging around with old software.
Get an extra system partition, or an external FW HD, for your older OS.
j o a r
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