[imp] horde 3.2 / imp 4.2 performance issues

[Liam Hoekenga]

The loads on our machines have been much higher since we upgraded from  
Horde 3.0.x / IMP 4.0.x. to the release candidates of Horde 3.2 and  
IMP 4.2.  The load on our machines seems to be hanging out in the 3-5  
range, and the application gets quite pokey.

Our pool is made up of 3.0 - 3.6 ghz xeons (3-4 yo), w/ 4gb of RAM,  
the 2.6.21.3 kernel, apache 2.2.3 and php 5.2.5, on our own LFS based  
distribution.  No load balancer.  Mysql 5.0.45 and Memcache 1.2.5 on  
the backend.  Cyrus 2.2.12.

I've attached our horde and imp conf.php files.  Am I doing something   
stupid in either of them?

Liam





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<?php
/* CONFIG START. DO NOT CHANGE ANYTHING IN OR AFTER THIS LINE. */
// $Horde: imp/config/conf.xml,v 1.53.2.24 2008/03/10 17:13:06 slusarz Exp $
$conf['spell']['params']['path'] = '/usr/bin/aspell';
$conf['spell']['driver'] = 'aspell';
$conf['utils']['gnupg_keyserver'] = array('pgp.mit.edu');
$conf['utils']['gnupg_timeout'] = 10;
$conf['menu']['apps'] = array();
$conf['user']['select_sentmail_folder'] = true;
$conf['user']['allow_resume_all_in_drafts'] = true;
$conf['user']['allow_folders'] = true;
$conf['user']['allow_resume_all'] = false;
$conf['user']['allow_view_source'] = true;
$conf['user']['alternate_login'] = false;
$conf['user']['redirect_on_logout'] = false;
$conf['user']['select_view'] = true;
$conf['server']['change_server'] = false;
$conf['server']['change_port'] = false;
$conf['server']['change_protocol'] = false;
$conf['server']['change_smtphost'] = false;
$conf['server']['change_smtpport'] = false;
$conf['server']['server_list'] = 'none';
$conf['server']['fixed_folders'] = array();
$conf['server']['sort_limit'] = 0;
$conf['server']['cache_folders'] = true;
$conf['server']['cachejsparams']['timeout'] = 14400;
$conf['server']['cachejsparams']['mtime'] = true;
$conf['server']['cachejs'] = true;
$conf['server']['cachecssparams']['timeout'] = 14400;
$conf['server']['cachecssparams']['mtime'] = true;
$conf['server']['cachecss'] = true;
$conf['mailbox']['show_preview'] = false;
$conf['fetchmail']['show_account_colors'] = false;
$conf['fetchmail']['size_limit'] = 4000000;
$conf['msgcache']['use_compress'] = false;
$conf['msgcache']['preview_size'] = 1000;
$conf['msgcache']['lifetime'] = 2592000;
$conf['msgcache']['use_msgcache'] = true;
$conf['mlistcache']['lifetime'] = 604800;
$conf['mlistcache']['use_mlistcache'] = true;
$conf['msgsettings']['filtering']['words'] = './config/filter.txt';
$conf['msgsettings']['filtering']['replacement'] = '****';
$conf['spam']['spamfolder'] = true;
$conf['spam']['program'] = '/usr/local/projects/webmail/bin/spam';
$conf['spam']['reporting'] = true;
$conf['notspam']['spamfolder'] = true;
$conf['notspam']['program'] = '/usr/local/projects/webmail/bin/notspam';
$conf['notspam']['reporting'] = true;
$conf['print']['add_printedby'] = false;
$conf['msg']['prepend_header'] = true;
$conf['msg']['append_trailer'] = false;
$conf['compose']['allow_receipts'] = true;
$conf['compose']['special_characters'] = true;
$conf['compose']['use_vfs'] = true;
$conf['compose']['link_attachments'] = false;
$conf['compose']['attach_size_limit'] = 52428800;
$conf['compose']['attach_count_limit'] = 0;
$conf['compose']['reply_limit'] = 99614720;
$conf['hooks']['vinfo'] = false;
$conf['hooks']['postlogin'] = true;
$conf['hooks']['postsent'] = false;
$conf['hooks']['signature'] = false;
$conf['hooks']['trailer'] = false;
$conf['hooks']['fetchmail_filter'] = false;
$conf['hooks']['mbox_redirect'] = false;
$conf['hooks']['mbox_icon'] = false;
$conf['hooks']['spam_bounce'] = true;
$conf['hooks']['msglist_format'] = true;
$conf['maillog']['use_maillog'] = true;
$conf['sentmail']['params']['threshold'] = 60;
$conf['sentmail']['params']['limit_period'] = 24;
$conf['sentmail']['params']['table'] = 'imp_sentmail';
$conf['sentmail']['params']['driverconfig'] = 'horde';
$conf['sentmail']['driver'] = 'sql';
$conf['tasklist']['use_tasklist'] = false;
$conf['notepad']['use_notepad'] = false;
/* CONFIG END. DO NOT CHANGE ANYTHING IN OR BEFORE THIS LINE. */
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<?php
/* CONFIG START. DO NOT CHANGE ANYTHING IN OR AFTER THIS LINE. */
// $Horde: horde/config/conf.xml,v 1.74.2.57 2008/03/11 16:07:20 jan Exp $
$conf['vhosts'] = false;
$conf['debug_level'] = E_ERROR;
$conf['max_exec_time'] = 0;
$conf['compress_pages'] = true;
$conf['umask'] = 077;
$conf['use_ssl'] = 2;
$conf['server']['name'] = $_SERVER['SERVER_NAME'];
$conf['server']['port'] = $_SERVER['SERVER_PORT'];
$conf['urls']['pretty'] = false;
$conf['safe_ips'] = array();
$conf['session']['name'] = 'Horde';
$conf['session']['use_only_cookies'] = true;
$conf['session']['cache_limiter'] = 'nocache';
$conf['session']['timeout'] = 0;
$conf['cookie']['domain'] = $_SERVER['SERVER_NAME'];
$conf['cookie']['path'] = '/horde';
$conf['sql']['persistent'] = false;
$conf['sql']['username'] = 'horde';
$conf['sql']['password'] = '******';
$conf['sql']['hostspec'] = 'mysql.example.edu';
$conf['sql']['port'] = 3306;
$conf['sql']['protocol'] = 'tcp';
$conf['sql']['database'] = 'horde';
$conf['sql']['charset'] = 'iso-8859-1';
$conf['sql']['splitread'] = false;
$conf['sql']['phptype'] = 'mysqli';
$conf['auth']['admins'] = array('liamr');
$conf['auth']['checkip'] = false;
$conf['auth']['checkbrowser'] = true;
$conf['auth']['alternate_login'] = false;
$conf['auth']['redirect_on_logout'] = false;
$conf['auth']['params']['requestuser'] = false;
$conf['auth']['driver'] = 'cosign';
$conf['signup']['allow'] = false;
$conf['log']['priority'] = PEAR_LOG_ERR;
$conf['log']['ident'] = 'HORDE';
$conf['log']['params'] = array();
$conf['log']['name'] = '/tmp/horde.log';
$conf['log']['params']['append'] = true;
$conf['log']['type'] = 'file';
$conf['log']['enabled'] = true;
$conf['log_accesskeys'] = false;
$conf['prefs']['params']['driverconfig'] = 'horde';
$conf['prefs']['driver'] = 'sql';
$conf['alarms']['params']['driverconfig'] = 'horde';
$conf['alarms']['params']['ttl'] = 300;
$conf['alarms']['driver'] = 'sql';
$conf['datatree']['params']['driverconfig'] = 'horde';
$conf['datatree']['driver'] = 'sql';
$conf['group']['driver'] = 'datatree';
$conf['group']['cache'] = false;
$conf['share']['no_sharing'] = true;
$conf['share']['cache'] = false;
$conf['share']['driver'] = 'datatree';
$conf['cache']['default_lifetime'] = 14400;
$conf['cache']['driver'] = 'memcache';
$conf['token']['driver'] = 'none';
$conf['mailer']['params']['sendmail_path'] = '/usr/sbin/sendmail';
$conf['mailer']['params']['sendmail_args'] = '-oi';
$conf['mailer']['type'] = 'sendmail';
$conf['mailformat']['brokenrfc2231'] = false;
$conf['vfs']['params']['driverconfig'] = 'horde';
$conf['vfs']['type'] = 'sql';
$conf['sessionhandler']['params']['track'] = true;
$conf['sessionhandler']['type'] = 'memcache';
$conf['mime']['magic_db'] = '/usr/share/misc/magic';
$conf['geoip']['datafile'] = '/etc/GeoIP.dat';
$conf['problems']['email'] = 'webmaster at example.edu';
$conf['problems']['maildomain'] = 'example.edu';
$conf['problems']['tickets'] = false;
$conf['problems']['attachments'] = true;
$conf['menu']['apps'] = array('imp', 'turba');
$conf['menu']['always'] = false;
$conf['menu']['links']['help'] = 'all';
$conf['menu']['links']['help_about'] = true;
$conf['menu']['links']['options'] = 'authenticated';
$conf['menu']['links']['problem'] = 'never';
$conf['menu']['links']['login'] = 'all';
$conf['menu']['links']['logout'] = 'authenticated';
$conf['hooks']['permsdenied'] = false;
$conf['hooks']['username'] = false;
$conf['hooks']['preauthenticate'] = false;
$conf['hooks']['postauthenticate'] = false;
$conf['hooks']['authldap'] = false;
$conf['hooks']['groupldap'] = false;
$conf['portal']['fixed_blocks'] = array();
$conf['weatherdotcom']['partner_id'] = '*****';
$conf['weatherdotcom']['license_key'] = '*****';
$conf['accounts']['driver'] = 'null';
$conf['user']['verify_from_addr'] = false;
$conf['imsp']['enabled'] = false;
$conf['kolab']['enabled'] = false;
$conf['memcache']['hostspec'] = array('memcache1.example.edu', 'memcache2.example.edu');
$conf['memcache']['port'] = array('11211', '11211');
$conf['memcache']['weight'] = array();
$conf['memcache']['persistent'] = false;
$conf['memcache']['c_threshold'] = 0;
$conf['memcache']['compression'] = true;
$conf['memcache']['large_items'] = true;
$conf['memcache']['enabled'] = true;
/* CONFIG END. DO NOT CHANGE ANYTHING IN OR BEFORE THIS LINE. */
$conf['auth']['redirect_on_logout'] = 'https://' . $_SERVER[ 'SERVER_NAME' ]
        . '/cgi-bin/logout?http://' . $_SERVER[ 'SERVER_NAME' ] . '/';