phpmyadmin работает очень медленно (information_schema)

У меня такой сценарий с двумя серверами (виртуальный хостинг):

Linux Server # 1 - MySQL 5.5 - 8000 баз данных

Linux Server # 2 - MySQL 5.6 - 7000 баз данных

При размещении phpMyAdmin 4.xx первый доступ будет очень медленным на обоих серверах (более 16 секунд для рендеринга страницы). Включение отладки, которая не может идентифицировать запросы, которые выполняет information_schema, следующим образом:

[1f94c8d385c8b4d595d10b6542624c40] => Array (
    [count] => 1
    [query] => SELECT `SCHEMA_NAME` FROM `INFORMATION_SCHEMA`.`SCHEMATA`, (select DB_first_level from ( SELECT distinct SUBSTRING_INDEX(SCHEMA_NAME, '_', 1) DB_first_level FROM INFORMATION_SCHEMA.SCHEMATA WHERE TRUE AND `SCHEMA_NAME` NOT REGEXP 'information_schema' ) t ORDER BY DB_first_level ASC LIMIT 0, 250) t2 where 1 = locate(concat(DB_first_level, '_'), concat(SCHEMA_NAME, '_')) order by SCHEMA_NAME ASC
    [time] => 3.34156107903
    [trace] => Array (
        [0] => Array(
            [0] => ./libraries/DatabaseInterface.class.php#205: PMA_DatabaseInterface->_dbgQuery()
            [1] => ./libraries/DatabaseInterface.class.php#1705: PMA_DatabaseInterface->tryQuery()
            [2] => ./libraries/navigation/Nodes/Node.class.php#383: PMA_DatabaseInterface->fetchResult()
            [3] => ./libraries/navigation/NavigationTree.class.php#211: Node->getData()
            [4] => ./libraries/navigation/NavigationTree.class.php#674: PMA_NavigationTree->_buildPath()
            [5] => ./libraries/navigation/Navigation.class.php#52: PMA_NavigationTree->renderState()
            [6] => ./libraries/Header.class.php#377: PMA_Navigation->getDisplay()
            [7] => ./libraries/Response.class.php#262: PMA_Header->getDisplay()
            [8] => ./libraries/Response.class.php#275: PMA_Response->_getDisplay()
            [9] => ./libraries/Response.class.php#373: PMA_Response->_htmlResponse()
            [10] => ./libraries/OutputBuffering.class.php#114: PMA_Response::response()
            [11] => PMA_OutputBuffering::stop()
        )
    )
)

[5f54e097676bb853308c7efc720c99f8] => Array (
    [count] => 2
    [query] => select COUNT(*) from ( SELECT distinct SUBSTRING_INDEX(SCHEMA_NAME, '_', 1) DB_first_level FROM INFORMATION_SCHEMA.SCHEMATA WHERE TRUE AND `SCHEMA_NAME` NOT REGEXP 'information_schema' ) t 
    [time] => 1.7902340889
    [trace] => Array (
        [0] => Array (
            [0] => ./libraries/DatabaseInterface.class.php#205: PMA_DatabaseInterface->_dbgQuery()
            [1] => ./libraries/DatabaseInterface.class.php#1563: PMA_DatabaseInterface->tryQuery()
            [2] => ./libraries/navigation/Nodes/Node.class.php#406: PMA_DatabaseInterface->fetchValue()
            [3] => ./libraries/navigation/NavigationTree.class.php#1072: Node->getPresence()
            [4] => ./libraries/navigation/NavigationTree.class.php#677: PMA_NavigationTree->_fastFilterHtml()
            [5] => ./libraries/navigation/Navigation.class.php#52: PMA_NavigationTree->renderState()
            [6] => ./libraries/Header.class.php#377: PMA_Navigation->getDisplay()
            [7] => ./libraries/Response.class.php#262: PMA_Header->getDisplay()
            [8] => ./libraries/Response.class.php#275: PMA_Response->_getDisplay()
            [9] => ./libraries/Response.class.php#373: PMA_Response->_htmlResponse()
            [10] => ./libraries/OutputBuffering.class.php#114: PMA_Response::response()
            [11] => PMA_OutputBuffering::stop()
        )

        [1] => Array (
            [0] => ./libraries/DatabaseInterface.class.php#205: PMA_DatabaseInterface->_dbgQuery()
            [1] => ./libraries/DatabaseInterface.class.php#1563: PMA_DatabaseInterface->tryQuery()
            [2] => ./libraries/navigation/Nodes/Node.class.php#406: PMA_DatabaseInterface->fetchValue()
            [3] => ./libraries/navigation/NavigationTree.class.php#1148: Node->getPresence()
            [4] => ./libraries/navigation/NavigationTree.class.php#678: PMA_NavigationTree->_getPageSelector()
            [5] => ./libraries/navigation/Navigation.class.php#52: PMA_NavigationTree->renderState()
            [6] => ./libraries/Header.class.php#377: PMA_Navigation->getDisplay()
            [7] => ./libraries/Response.class.php#262: PMA_Header->getDisplay()
            [8] => ./libraries/Response.class.php#275: PMA_Response->_getDisplay()
            [9] => ./libraries/Response.class.php#373: PMA_Response->_htmlResponse()
            [10] => ./libraries/OutputBuffering.class.php#114: PMA_Response::response()
            [11] => PMA_OutputBuffering::stop()
        )
    )
)

У кого-нибудь есть предложения?

РЕДАКТИРОВАТЬ: я забыл сказать, что innodb_stats_on_metadata уже выключен.