99% cpu (httpd) while opening 400K message in IMP

[Ryan Zwahr]

Hi all,
I have installed IMP on both a Redhat 7.0 server and a Redhat 6.2 server, and 
this problem only seems to be prevalent on the 6.2 server.  I discovered this 
while trying to open a mail that was 400K of text.  Just to see what would 
happen, I forwarded this same mail to my box running redhat 7.0, and did not 
have the problem.  The problem is, when I click to open the mail, it was timing 
out initially, saying it was exceeding the maximum time a script could run in 
horde.lib line 1195 or something like that.  I went into php3.ini and changed 
that value from 30 to 180 seconds.  This stopped the timeout problem, but it 
takes about a minute to open up this mail.  I opened up a telnet session to the 
server and watched as I opened this mail.  What is happening is, as soon as I 
click to open this mail, an httpd process (Apache) is spawned and uses 99.9% of 
the processor for the entire 1 1/2 minutes while the mail is being opened.  
>From the PC's perspective, it just sits with an hourglass like it's waiting. 
This server is a really powerful box, with 4 processors, running raid and with 
like 512 MB memory, so I think it's highly unlikely that this is THAT cpu 
intensive.  Something is wrong.  I forwarded this same message to my server at 
home running 7.0 with a measly p166mmx and 32 meg of ram, and it opens in 5 
seconds.  Has anyone seen this?  This is very odd behavior.  I will try and 
include some screen output on a separate post.  Are there any known bugs out 
there for such behavior?  I am using the rh6 stuff from ftp.horde.org (the 
rpms), php3, imp 2.2.4, mysql and ldap.  Let me know if you need specific 
versions.  Of course I am using php4 on my 7.0 box, so we're not talking the 
same exact versions on both boxes, but still, I don't think it should be like 
this.  Imap server is on the same machine too, so everything's local.

Thanks,
Ryan Zwahr

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