FW: [horde] VERY slow login...

Chip Bell cbell at msbv.com
Thu May 27 07:57:28 PDT 2004 

I am being told by the admin (remotely I can only test web mail) that
Thunderbird (IMAP client) is a lot slower navigating folders when the
webmail is slow.  He tells me that sending mail does not change though.



-----Original Message-----
From: Wang, Yu [mailto:ywang at unf.edu] 
Sent: Thursday, May 27, 2004 10:49 AM
To: Chip Bell; horde at lists.horde.org
Subject: RE: [horde] VERY slow login...

Man, I only had one exact day of good feeling:)

Did you do the native IMAP test using Outlook Express that I suggested
when login daymare happens? That test isolate problem from
Horde/PHP/Apache and xinet/IMAP.

--Yu Wang

Information Technology Services
University of North Florida
(904) 620-2820



-----Original Message-----
From: horde-bounces at lists.horde.org
[mailto:horde-bounces at lists.horde.org]On Behalf Of Chip Bell
Sent: Thursday, May 27, 2004 10:32 AM
To: horde at lists.horde.org
Subject: FW: [horde] VERY slow login...


Well, it's happening again.  I really need some help with this.  

So far, I've increased the load on the xinetd as instructed..

Turned up the apache config to 
 Min serv 40
Max serv 60
Child prc 2000
Keep alive "off"

I just don't know where to look for errors or what to fix..again.

When users try to login, the authentication takes forever.  It seems
that if multiple people are trying to login...they'll all get through at
the same time.  Once logged in, horde flies.

Please help.  This is a production box and I'm on day 4 of this.
Yesterday turning up the xinetd (cps  2000 60) helped for a while, then
it bogged down.  I turned it up to (cps 3000 60) and it helped for a
while too.

Thanks for ANYTHING you can suggest.

-----Original Message-----
From: Chip Bell 
Sent: Wednesday, May 26, 2004 10:29 AM
To: horde at lists.horde.org
Subject: FW: [horde] VERY slow login...

Yu, "you" are the man.  Your fix worked dead on.  I cannot tell you how
much I appreciate your and everyone else's help.  :)  

Thanks again..

Chip

-----Original Message-----
From: Wang, Yu [mailto:ywang at unf.edu] 
Sent: Wednesday, May 26, 2004 9:31 AM
To: Chip Bell; horde at lists.horde.org
Subject: RE: [horde] VERY slow login...

Since you set up your Linux box not long ago so I think you don't need
to upgrade your IMAP. Instead, you can twinkle the xinetd configuration.
under /etc you can see xinetd.conf and xinetd.d directory. The
xinetd.conf contains the default setting of xinetd and the xinetd.d
directory contains configuration files for services that need xinetd to
invoke them (man xinetd and man xinetd.conf). You should see services
like telnet, ftp, imap, etc. 
Now, in xinetd.conf, you should see something like:

defaults
{
        instances      = 600
        log_type       = SYSLOG authpriv info
        log_on_success = HOST PID
        log_on_failure = HOST
        cps            = 250 30
}

Make the instances = UNLIMITED  and make the cps = 2000 60 (which means
in 60 seconds interval, we allow 2000 incoming connections). Restart
xinetd and watch if any services (Login to Horde) drop. If this works
like charm, then gradually reduce the number. When you see login fails
again, you know that you close to the services limit and then use that
number multiple a safety factor (1.2-1.5). Then relax.

About Gentoo, it's great. It has three stages. You can play with stage 3
first then 2 then 1. then you will know how linux really works.

--Yu Wang

Information Technology Services
University of North Florida
(904) 620-2820



-----Original Message-----
From: horde-bounces at lists.horde.org
[mailto:horde-bounces at lists.horde.org]On Behalf Of Chip Bell
Sent: Wednesday, May 26, 2004 8:54 AM
To: horde at lists.horde.org
Subject: FW: [horde] VERY slow login...


I found the issue, it's xinetd.  If I restart this service, the box
screams past the login.  Now my issue is how to fix this...??  Help
anyone?

-----Original Message-----
From: Chip Bell 
Sent: Tuesday, May 25, 2004 6:26 PM
To: horde at lists.horde.org
Subject: FW: [horde] VERY slow login...

Actually, my box uses xinetd.  When I open the config file, I don't'
have very much, just "instances,log_type,log_on_success,log_on_failure"
and can't find anywhere to specifically configure imap.

-----Original Message-----
From: Wang, Yu [mailto:ywang at unf.edu] 
Sent: Tuesday, May 25, 2004 4:16 PM
To: horde at lists.horde.org
Subject: FW: [horde] VERY slow login...

> -----Original Message-----
> From: Wang, Yu 
> Sent: Tuesday, May 25, 2004 4:07 PM
> To: 'Chip Bell'
> Subject: RE: [horde] VERY slow login...
> 
> 
> >How can up update the IMAP?  
> get a newer version:)
> 
> >Our users see the Welcome page..
> So not the big box problem.
> 
> >What exactly am I looking for in Inetd config?
> do "man inetd" and look for -R (-r) option.
> for Linux, the default is 1000 per minute.
> for Solaris, the default is 40 per minute.
> You can change it by giving -R value when start up the inetd.
> 
> >Thank you SO much for the info...
> 
> -----Original Message-----
> From: Wang, Yu [mailto:ywang at unf.edu] 
> Sent: Tuesday, May 25, 2004 3:51 PM
> To: Chip Bell; horde at lists.horde.org
> Subject: RE: [horde] VERY slow login...
> 
> The login failure with bad credential occurred several times 
> when users reached about 100 and I did some tests and found 
> that our IMAP was more than two year ago and it just cannot 
> handle the heat even server is 4u4G. I don't know how did you 
> setup the login. What page does a user see? the 'Welcome 
> page" or their INBOX? My login to the "Welcome page" is fast 
> (1 sec). But since I have big INBOX (around 1000 emails). 
> Open my INBOX generally takes a while. 
> 
> Do you run many other services on that box (like web, telnet, 
> ftp...)? I assume your IMAP is invoked by inetd. Check to see 
> if you have limit set in your inetd config. To isolate the 
> problem from Horde and IMAP/Other part, you can do following test:
> When login failure or slowness occurs, use a different mail 
> reader (like outlook express) to do IMAP connection to the 
> same server. If you see failure or slowness too, it's not 
> Horde's problem. check your IMAP and other things. Otherwise, 
> it's Horde that needs to be tuned.
> 
> --Yu Wang
> 
> Information Technology Services
> University of North Florida
> (904) 620-2820
> 
> 
> 
> -----Original Message-----
> From: horde-bounces at lists.horde.org
> [mailto:horde-bounces at lists.horde.org]On Behalf Of Chip Bell
> Sent: Tuesday, May 25, 2004 3:29 PM
> To: horde at lists.horde.org
> Subject: FW: [horde] VERY slow login...
> 
> 
> Ok, here we go.
> 
> 1.  Don't know, about 11 gigs so far of storage.
> 2.  Old IMAP?  Can you elaborate?
> 3.  p3 1ghz, 3 gigs ram, UltraScsi 3 Software RAID 5.
> 
> The thing is, the page opens very quickly, and once you're 
> IN, it's as fast as you can click.
> 
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