> Date: Wed, 9 May 2018 08:27:33 -0400
> From: Ben Carter
>
>
> For starters:
>
> strace one of the processes & see if it's making any system calls at all.
>
> pstack a process multiple times to get PC samples.
>
> gcore a process to get a core dump & take a look at the core dump with gdb.
>
For starters:
strace one of the processes & see if it's making any system calls at all.
pstack a process multiple times to get PC samples.
gcore a process to get a core dump & take a look at the core dump with gdb.
If you know that a specific account is likely to have this issue, enable
IMAP
Hello,
We've recently upgrade to cyrus 3.0.6 and we've been experiencing issue
where imapd will get stuck in an Append and take 100% CPU time. The
client doesn't see anything weird. I've tried leaving the processes to
see if they resolve, but they never did. Doing a kill -TERM twice will
k
On Fri, Nov 11, 2011 at 04:23:47PM +, Guy wrote:
> The original machine is running 2.3.16 without replication and the
> average load rarely went over 1. On the new server running 2.4.12
> (details below) I'm seeing the average load hover around 5 constantly.
> The new box is running replication
> Hi,
>
> I've got an imap server being hammered by a program that is constantly
> connecting via IMAP, searching, reading and deleting emails. At a very
> rough estimate there'll be 10 to 20 new emails every minute that
> arrive, are checked and deleted.
>
> The original machine is running 2.3.16
Hi,
I've got an imap server being hammered by a program that is constantly
connecting via IMAP, searching, reading and deleting emails. At a very
rough estimate there'll be 10 to 20 new emails every minute that
arrive, are checked and deleted.
The original machine is running 2.3.16 without replic
> 0.23 seconds on a 35MB mailboxes file. I thought I saw in one of you
> other e-mails that yours was taking about one second?
Yeah, .95 seconds in my case. Even with a 4-cpu box, our user load
makes that intolerable, the latency causes things to back up.
John
--
John Madden
Sr UNIX System
On 12/09/2009 10:43 AM, John Madden wrote:
Yes, sorry, Wesley Craig's response pointed me in that direction and that
definitely seems to be the problem.
How many mailboxes are returned by these LIST operations? We run Horde
with Cyrus here, but we have no shared mailboxes and no problems with
Wesley Craig wrote:
> On 08 Dec 2009, at 18:55, Andrew Morgan wrote:
>> How many mailboxes are returned by these LIST operations? We run
>> Horde with Cyrus here, but we have no shared mailboxes and no
>> problems with high load on the Cyrus frontends.
>
> How do you have IMP configured? As
> We set the following in imapd.conf:
>
> sharedprefix: ~ Public Folders
(We don't use altnamespace.)
--
John Madden
Sr UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmad...@ivytech.edu
Cyrus Home Page: http://cyrusimap.web.cmu.edu/
Cyrus Wiki/FAQ: http://cyrusimap.web.cm
>> Yes, sorry, Wesley Craig's response pointed me in that direction and that
>> definitely seems to be the problem.
>
> How many mailboxes are returned by these LIST operations? We run Horde
> with Cyrus here, but we have no shared mailboxes and no problems with high
> load on the Cyrus fronte
On 08 Dec 2009, at 18:55, Andrew Morgan wrote:
> How many mailboxes are returned by these LIST operations? We run
> Horde with Cyrus here, but we have no shared mailboxes and no
> problems with high load on the Cyrus frontends.
How do you have IMP configured? As I recall, at least in older
On Tue, 8 Dec 2009, John Madden wrote:
>>>>> read(0, "0002 LIST \"\" INBOX.*\r\n", 4096) = 26
>>>>> read(0, "0003 LIST \"\" user.*\r\n", 4096) = 25
>>>>> read(0, "0004 LIST \"\" *\r\n&q
On Dec 8, 2009, at 4:03 PM, John Madden wrote:
>> Do your users have access to each other's mailboxes? Is there are a large
>> number of results?
>
> a02 namespace
> * NAMESPACE (("INBOX." ".")) (("user." ".")) (("" "."))
We set the following in imapd.conf:
sharedprefix: ~ Public Folders
Th
>>>> read(0, "0002 LIST \"\" INBOX.*\r\n", 4096) = 26
>>>> read(0, "0003 LIST \"\" user.*\r\n", 4096) = 25
>>>> read(0, "0004 LIST \"\" *\r\n", 4096) = 20
>
> Maybe I'm losin
t;."))
Do each of these LIST operations take a long time to perform?
>>> read(0, "0002 LIST \"\" INBOX.*\r\n", 4096) = 26
>>> read(0, "0003 LIST \"\" user.*\r\n", 4096) = 25
>>> read(0, "0004 LIST \"\"
> Do your users have access to each other's mailboxes? Is there are a large
> number of results?
a02 namespace
* NAMESPACE (("INBOX." ".")) (("user." ".")) (("" "."))
--
John Madden
Sr UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmad...@ivytech.edu
Cyrus Home Page: http
On Tue, 8 Dec 2009, John Madden wrote:
>>> read(0, "0002 LIST \"\" INBOX.*\r\n", 4096) = 26
>>> read(0, "0003 LIST \"\" user.*\r\n", 4096) = 25
>>> read(0, "0004 LIST \"\" *\r\n", 4096) = 20
>>
>> Those LIST queries seem a little odd coming from a normal user account in
>> Cyrus. Ar
>> read(0, "0002 LIST \"\" INBOX.*\r\n", 4096) = 26
>> read(0, "0003 LIST \"\" user.*\r\n", 4096) = 25
>> read(0, "0004 LIST \"\" *\r\n", 4096) = 20
>
> Those LIST queries seem a little odd coming from a normal user account in
> Cyrus. Are you logging in as a Cyrus admin account? Wh
On Mon, Dec 07, 2009 at 01:37:28PM -0800, Andrew Morgan wrote:
> On Mon, 7 Dec 2009, John Madden wrote:
>
> >> At a guess, it sounds like load from LIST. You should be able to see
> >> what's causing the load if you have several seconds. For example,
> >> enable telemetry and look for long turn
-Original Message-
From: Andrew Morgan
Sent: December 7, 2009 5:37 PM
To: John Madden
Cc: info-cyrus@lists.andrew.cmu.edu
Subject: Re: proxyd cpu usage
On Mon, 7 Dec 2009, John Madden wrote:
>> At a guess, it sounds like load from LIST. You should be able to see
>> wh
On Mon, 7 Dec 2009, John Madden wrote:
>> At a guess, it sounds like load from LIST. You should be able to see
>> what's causing the load if you have several seconds. For example,
>> enable telemetry and look for long turn around. Or use strace (or
>> equiv). Have you experimented with foolstu
> At a guess, it sounds like load from LIST. You should be able to see
> what's causing the load if you have several seconds. For example,
> enable telemetry and look for long turn around. Or use strace (or
> equiv). Have you experimented with foolstupidclients? What is your
> client m
> At a guess, it sounds like load from LIST. You should be able to see
> what's causing the load if you have several seconds. For example,
> enable telemetry and look for long turn around. Or use strace (or
> equiv). Have you experimented with foolstupidclients? What is your
> client m
On 07 Dec 2009, at 10:33, John Madden wrote:
> In a 2.3.15 murder I'm seeing high frontend server cpu usage and I'm
> wondering if it's normal or if there's something I can do to reduce
> it.
> What are the bottlenecks that can lead to proxyd pegging a cpu for
In a 2.3.15 murder I'm seeing high frontend server cpu usage and I'm
wondering if it's normal or if there's something I can do to reduce it.
What are the bottlenecks that can lead to proxyd pegging a cpu for
several seconds, particularly during login (using imapproxy to re
We've noticed a strange pattern of load and cpu usage on our murder
master.
The machine will go a few days will minimal load and very little cpu
usage (~5%). Then for a few days load will jump to 2, and CPU usage
will jump to 40% (35% in system mode).
So the CPU usage graph looks
Two day ago I send a message that say I saw a lot of CPU usage.
I find the imap command that make this Cpu grow.
When I make a telnet on my cyrus server and if I make . LIST "" *
telnet localhost imap
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'
We don't see this; we have approx 1 users on a dual processor
ultra with 2 gigs of memory. We run into problems when we have more
than 5500 simultaneous connections or so.
Using the Berkeley db mailboxes file tends to take more CPU usage.
Larry
Date: Tue, 24 Jul 2001 17:02:54
I use cyrus 2.0.15 with sasl 1.5.24.
Cyrus is install on SUN Ultra Entreprise 450, 1 Go RAM on solrais 2.6
We have 2 users.
I saw that imapd process take a lot of CPU usage.
For exemple the cpu usage of one imapd process is between 3 and 6 %
I dont know if it normal ?
thanks
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