212197 - memory balloons to over 200MB

Status: RESOLVED WORKSFORME

(Core Graveyard :: GFX: Win32, defect)

Description

[Phil Barton]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624

loading up this page in mozilla 1.4 win32, and watching task manager...  the
computer starts to grind, then memory usage by mozilla gows up, up, and away.  i
closed the browser at 150MB, and killed the process after mozilla.exe had passed
the 200MB mark.  the website listed is the only example i have, and i have only
tried this twice (with the same results).

Reproducible: Always

Steps to Reproduce:
1. go to http://www.kernel.org/pub/linux/kernel/v2.5/testing/cset/ and watch
your memory usage
2.
3.

Actual Results:  
memory usage steadily grows, at a certain point the browser becomes unusable and
the process must be killed.

Expected Results:  
hmm...  not grown by *that* much, i guess.

winxp w/sp1, 550mhz slot-a k7, 256mb ram

Comment 1

[Anders Pedersen]

WFM.

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7b) Gecko/20040331
Microsoft Windows 2000 Professional 5.00.2195 SP4

Comment 2

[WADA:World Anti-bad-Duping Agency]

Comfirmed(probably) with 2004042109(1.7 RC1,Zip Build)/Win-2K(SP4).

Recreation scenario:
(1) Start "Task Manager" of MS Windows 2000(or XP) and choose "process".
    Display "Memory used"(Probably real memory use) and "Virtual Memory Size".
(2) Start Mozilla ("Image Name" is mozilla.exe)
(3) Repeat "Open New Tab" and "Close Tab"
    -> "Virtual Momory Size" increases on tab open and decreases on tab close
       No problem.
(4) Repeat "File/New/Navigatio Window" and close opened window
    -> "Virtual Momory Size" increases on open but doesn't decrease on close
       This is the problem.
(5) Minimizing of window reduces "Memory used(probably used real memory)"
    to several Mega Bytes order.
    This indicates Real Momory is freed successufully.

If new windows are opened by "Open link in new window" and if the page contains
large data such as image, increasing virtual memory size in step (4) becomes large.

Since real memory is freeed, there is no impact on memory use usually and this
is  not a critical problem.
However, very large disk space for swap will be used.
And this may casue memory management problem such as performance degradiation,
becasuse memory management of MS Windows is not so well designed.

Comment 3

[OstGote!]

WFM Mozilla 2004042608 WinNT4

IMO this bug could be resolved as INVALID because this bug is about the example
URL and the page doesn't seem to cause the reporter's problem. It's not
reproducable. Comment 2 belongs to other bugs.

Comment 4

[WADA:World Anti-bad-Duping Agency]

(In reply to comment #3)
> Comment 2 belongs to other bugs.
Oh sorry, I missunderstood this bug.
example URL is WORKSFORME too.
My comment 2 is probably one of the causes of Bug 215491.
( memory usage increases but never decreases)
I' report to  Bug 215491.
Thanks.

Comment 5

[WADA:World Anti-bad-Duping Agency]

Phil Barton, large virtual memory size problem exists as Bug 215491 / Bug 212197
says and I could recreate the problem on many window open/close when some kind
of   extentions such as Tab Browser Extention is used.
However, this problem is apparanltly not caused by URL you mentioned as Anders
Pedersen says.
If you still experience large virtual storage problem, close this bug as invalid
or worksforme, and join in Bug 215491.