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CPU use randomly jumps to 50% then to 100%



MailNews Core
14 years ago
9 years ago


(Reporter: Yuri Babich, Assigned: (not reading, please use seth@sspitzer.org instead))


Other Branch
Windows XP

Firefox Tracking Flags

(Not tracked)




14 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007

After several hours of work the CPU load (used by Mozilla ~= total) reaches a
high level (e.g. 50% or 100%). The task manager shows a constant line, not a
peak. The responsiveness of mozilla GUI however is relatively good. Other
applications seem to slow down only a little (sometimes noticably - but that may
be inteferenced by the virus scanner or sth.).

Total CPU measurements:
Measurement 1: ~1% at start, after ca. 110 min. -> 50%, after ca 35 Min -> 90%.
Measurement 2: ~1% at start, after pretty much exactly 30 min. -> 50%, after
pretty much exactly 60 Min -> 100%.

No apparent reason. Happens without direct user interaction.

Reproducible: Always

Steps to Reproduce:
1.Start mail only (not browser), enter passwords to download messages.
2.Work with other applications, read new messages as they arrive.

CPU: Pentium 4 (2.6 GHz) with Hyperthreading. (with 50%, the virtual processors
show uneven curves approx. 15% [0] and 85% [1])
Mozilla profile from previous versions was kept (installed each time the new
over old Mozilla).
There are several POP (various periods between checking for new mail) and one
IMAP account as well as NGs. (Problem happened even if not opening news and

P.S. Don't know which Mozilla component actually responsible.

Comment 1

14 years ago
I have downgraded to Moz 1.4.1 and the problem persists.
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4.1) Gecko/20031008

P.S. RAM/pagefile are large and not the issue. Hyperthreading of P4??? Other
applications don't have problems.
Version: Trunk → Other Branch
Product: MailNews → Core
This is an automated message, with ID "auto-resolve01".

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This bug has been automatically resolved after a period of inactivity (see above
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Last Resolved: 12 years ago
Resolution: --- → EXPIRED
Product: Core → MailNews Core
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