It can be whatever you wish it to be, or need it to be, after Kolab is done setting itself up with the bare necessities.

Kolab 3.4 is no longer supported, please upgrade to Kolab 16.

Furthermore, you provide insufficient information for any of us to appreciate it is indeed a Kolab problem.

There seems to be a simple discrepancy between the application of the Guam groupware folder filter rule and the use of IMAP command tags.

Compare the following two telemetry logs and note that;

• the IMAP + SSL version seems to have a newline-but-not-so-newline between the 3 tag and the ID command.
• the IMAP + SSL version uses both the 4 and EG0001 IMAP command tag (for the GETMETADATA command) in the request and the tagged response.

iPhone 6 with iOS 9.3.5 over IMAP + STARTTLS

>1472729996>2 OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE ACL RIGHTS=kxten QUOTA NAMESPACE UIDPLUS NO_ATOMIC_RENAME UNSELECT CHILDREN MULTIAPPEND BINARY CATENATE CONDSTORE ESEARCH SORT SORT=MODSEQ SORT=DISPLAY SORT=UID THREAD=ORDEREDSUBJECT THREAD=REFERENCES ANNOTATEMORE ANNOTATE-EXPERIMENT-1 METADATA LIST-EXTENDED LIST-STATUS LIST-MYRIGHTS WITHIN QRESYNC SCAN XLIST XMOVE MOVE SPECIAL-USE CREATE-SPECIAL-USE URLAUTH URLAUTH=BINARY X-NETSCAPE MUPDATE=mupdate://mupdate.mykolab.com/ LOGINDISABLED AUTH=PLAIN AUTH=LOGIN X-QUOTA=STORAGE X-QUOTA=MESSAGE X-QUOTA=X-ANNOTATION-STORAGE X-QUOTA=X-NUM-FOLDERS IDLE] User logged in SESSIONID=<cyrus-imapd-9801-1472729996-1-6144592888360014514>^M
<1472729997<3 ID ("name" "iPhone Mail" "version" "13G36" "os" "iOS" "os-version" "9.3.5 (13G36)")^M
>1472729997>* ID ("name" "Cyrus IMAPD" "version" "2.5.8.12-Kolab-2.5.8-13.1.el7.kolab_14 fb7ae876 2016-06-02" "vendor" "Project Cyrus" "support-url" "http://www.cyrusimap.org" "os" "Linux" "os-version" "3.10.0-327.28.3.el7.x86_64" "environment" "Built w/Cyrus SASL 2.1.26; Running w/Cyrus SASL 2.1.26; Built w/OpenSSL 1.0.1e-fips 11 Feb 2013; Running w/OpenSSL 1.0.1e-fips 11 Feb 2013; CMU Sieve 2.4; mmap = shared; lock = fcntl; nonblock = fcntl; idle = idled")^M
3 OK Completed^M
<1472729997<EG0003 GETMETADATA (DEPTH infinity) "*" (/shared/vendor/kolab/folder-type)^M
>1472729997>* METADATA INBOX (/shared/vendor/kolab/folder-type "mail")^M
* METADATA Addressbook (/shared/vendor/kolab/folder-type "contact")^M
* METADATA Archive (/shared/vendor/kolab/folder-type NIL)^M
* METADATA Archive/2005 (/shared/vendor/kolab/folder-type NIL)^M
* METADATA Archive/2012 (/shared/vendor/kolab/folder-type NIL)^M
* METADATA Archive/2013 (/shared/vendor/kolab/folder-type NIL)^M
* METADATA Archive/2016 (/shared/vendor/kolab/folder-type "mail")^M
* METADATA Calendar (/shared/vendor/kolab/folder-type "event")^M
* METADATA Configuration (/shared/vendor/kolab/folder-type "configuration")^M
* METADATA Contacts (/shared/vendor/kolab/folder-type "contact")^M
* METADATA Drafts (/shared/vendor/kolab/folder-type "mail")^M
* METADATA Files (/shared/vendor/kolab/folder-type "file")^M
* METADATA "Files/Lydia Selected" (/shared/vendor/kolab/folder-type "file")^M
* METADATA Journal (/shared/vendor/kolab/folder-type "journal")^M
* METADATA Notes (/shared/vendor/kolab/folder-type "note")^M
* METADATA Sent (/shared/vendor/kolab/folder-type "mail")^M
* METADATA Spam (/shared/vendor/kolab/folder-type "mail")^M
* METADATA Tasks (/shared/vendor/kolab/folder-type "task")^M
* METADATA Trash (/shared/vendor/kolab/folder-type "mail")^M
EG0003 OK Completed^M
<1472729997<4 LIST "" "*"^M
>1472729997>* LIST (\Noinferiors \HasNoChildren) "/" INBOX^M
* LIST (\HasNoChildren) "/" Addressbook^M
* LIST (\HasChildren) "/" Archive^M
* LIST (\HasNoChildren) "/" Archive/2005^M
* LIST (\HasNoChildren) "/" Archive/2012^M
* LIST (\HasNoChildren) "/" Archive/2013^M
* LIST (\HasNoChildren) "/" Archive/2016^M
* LIST (\HasNoChildren) "/" Calendar^M
* LIST (\HasNoChildren) "/" Configuration^M
* LIST (\HasNoChildren) "/" Contacts^M
* LIST (\HasNoChildren) "/" Drafts^M
* LIST (\HasChildren) "/" Files^M
* LIST (\HasNoChildren) "/" "Files/Lydia Selected"^M
* LIST (\HasNoChildren) "/" Journal^M
* LIST (\HasNoChildren) "/" Notes^M
* LIST (\HasNoChildren) "/" Sent^M
* LIST (\HasNoChildren) "/" Spam^M
* LIST (\HasNoChildren) "/" Tasks^M
* LIST (\HasNoChildren) "/" Trash^M
4 OK Completed (0.000 secs 20 calls)^M
<1472729997<5 SELECT INBOX^M
>1472729997>* 1538 EXISTS^M

iPhone 6 with iOS 9.3.5 over IMAP + SSL

>1472730137>2 OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE ACL RIGHTS=kxten QUOTA NAMESPACE UIDPLUS NO_ATOMIC_RENAME UNSELECT CHILDREN MULTIAPPEND BINARY CATENATE CONDSTORE ESEARCH SORT SORT=MODSEQ SORT=DISPLAY SORT=UID THREAD=ORDEREDSUBJECT THREAD=REFERENCES ANNOTATEMORE ANNOTATE-EXPERIMENT-1 METADATA LIST-EXTENDED LIST-STATUS LIST-MYRIGHTS WITHIN QRESYNC SCAN XLIST XMOVE MOVE SPECIAL-USE CREATE-SPECIAL-USE URLAUTH URLAUTH=BINARY X-NETSCAPE MUPDATE=mupdate://mupdate.mykolab.com/ LOGINDISABLED AUTH=PLAIN AUTH=LOGIN X-QUOTA=STORAGE X-QUOTA=MESSAGE X-QUOTA=X-ANNOTATION-STORAGE X-QUOTA=X-NUM-FOLDERS IDLE] User logged in SESSIONID=<cyrus-imapd-10395-1472730137-1-15481777282484342863>
<1472730137<3<1472730137< ID ("name" "iPhone Mail" "version" "13G36" "os" "iOS" "os-version" "9.3.5 (13G36)")
>1472730137>* ID ("name" "Cyrus IMAPD" "version" "2.5.8.12-Kolab-2.5.8-13.1.el7.kolab_14 fb7ae876 2016-06-02" "vendor" "Project Cyrus" "support-url" "http://www.cyrusimap.org" "os" "Linux" "os-version" "3.10.0-327.28.3.el7.x86_64" "environment" "Built w/Cyrus SASL 2.1.26; Running w/Cyrus SASL 2.1.26; Built w/OpenSSL 1.0.1e-fips 11 Feb 2013; Running w/OpenSSL 1.0.1e-fips 11 Feb 2013; CMU Sieve 2.4; mmap = shared; lock = fcntl; nonblock = fcntl; idle = idled")
3 OK Completed
<1472730137<4<1472730137<EG0001 GETMETADATA (DEPTH infinity) "*" (/shared/vendor/kolab/folder-type)
>1472730137>* METADATA INBOX (/shared/vendor/kolab/folder-type "mail")
* METADATA Addressbook (/shared/vendor/kolab/folder-type "contact")
* METADATA Archive (/shared/vendor/kolab/folder-type NIL)
* METADATA Archive/2005 (/shared/vendor/kolab/folder-type NIL)
* METADATA Archive/2012 (/shared/vendor/kolab/folder-type NIL)
* METADATA Archive/2013 (/shared/vendor/kolab/folder-type NIL)
* METADATA Archive/2016 (/shared/vendor/kolab/folder-type "mail")
* METADATA Calendar (/shared/vendor/kolab/folder-type "event")
* METADATA Configuration (/shared/vendor/kolab/folder-type "configuration")
* METADATA Contacts (/shared/vendor/kolab/folder-type "contact")
* METADATA Drafts (/shared/vendor/kolab/folder-type "mail")
* METADATA Files (/shared/vendor/kolab/folder-type "file")
* METADATA "Files/Lydia Selected" (/shared/vendor/kolab/folder-type "file")
* METADATA Journal (/shared/vendor/kolab/folder-type "journal")
* METADATA Notes (/shared/vendor/kolab/folder-type "note")
* METADATA Sent (/shared/vendor/kolab/folder-type "mail")
* METADATA Spam (/shared/vendor/kolab/folder-type "mail")
* METADATA Tasks (/shared/vendor/kolab/folder-type "task")
* METADATA Trash (/shared/vendor/kolab/folder-type "mail")
4EG0001 OK Completed

@Kimmo What you have installed as part of Kolab are web applications just like you would have them installed if it were without Kolab. There's no Kolab-specific extras or conditions for as far as the principle category of "a web server serving a web application written in PHP" goes.

The default is /etc/kolab/kolab.conf, and the source for that file is also shipped as documentation to the pykolab package:

$ rpm -qld pykolab

ipurge by now also obeys 0 for the -d option, so there's no longer a need to perform two commands per mailbox.

You specify a mailbox as it would appear to the cyrus-admin user, so user/john.doe/Spam@example.org, or user/john.doe/Ham@example.org.

Do you have enough entropy?

@chris I reckon you haven't been doing anything special, but have you been actively using the system (mainly, sending/receiving mails with, perhaps, some large attachments)?

If you have, and you can describe some of what has been the load on the system so far, perhaps we can reproduce the increased memory consumption on one of our VMs by letting it sit for a little while longer (and give it the same / similar load).

@troycarpenter If you could make that a bug report, that'd be lovely.

Note that for tracebacks and other large amounts of output, we have a pastebin that you can then refer to in tickets with P4 for example.

I recognize a tone in your message and choose to abandon further participation in the subject.