Ошибка Could not write to Store-FileSystem (rssFeeds)

Один раз в сутки в одно и тоже время форум (версия 4.1.17.1) на пол часа падает с ошибкой 500.

В логах ошибка "Could not write to Store-FileSystem (rssFeeds)":

Spoiler

#0 /home/admin/web/domen.ru/public_html/system/Data/AbstractData.php(109): IPS\_Log::log('Could not write...', 'datastore')
#1 /home/admin/web/domen.ru/public_html/system/Data/Store.php(166): IPS\Data\_AbstractData->__set('rssFeeds', Array)
#2 /home/admin/web/domen.ru/public_html/applications/core/sources/Rss/Rss.php(444): IPS\Data\_Store->__set('rssFeeds', Array)
#3 /home/admin/web/domen.ru/public_html/system/Dispatcher/Front.php(168): IPS\core\_Rss::getAllFeeds()
#4 /home/admin/web/domen.ru/public_html/system/Dispatcher/Dispatcher.php(86): IPS\Dispatcher\_Front->init()
#5 /home/admin/web/domen.ru/public_html/index.php(13): IPS\_Dispatcher::i()
#6 {main}

SELECT * FROM `forums_forums` LEFT JOIN `core_permission_index` ON core_permission_index.app='forums' AND core_permission_index.perm_type='forum' AND core_permission_index.perm_type_id=forums_forums.id LEFT JOIN `core_members` ON core_members.member_id=forums_forums.last_poster_id WHERE min_posts_view<=0 AND (sub_can_post=0 OR can_view_others=1) AND (( FIND_IN_SET(2,perm_view) ) OR perm_view='*' ) ORDER BY position
IPS\Db\Exception: Got error 28 from storage engine (1030)
#0 /home/admin/web/domen.ru/public_html/system/Db/Select.php(346): IPS\_Db->preparedQuery('/*IPS\\Node\\_Mod...', Array)
#1 /home/admin/web/domen.ru/public_html/system/Db/Select.php(408): IPS\Db\_Select->runQuery()
#2 /home/admin/web/domen.ru/public_html/system/Node/Model.php(410): IPS\Db\_Select->rewind()
#3 /home/admin/web/domen.ru/public_html/applications/forums/sources/Forum/Forum.php(718): IPS\Node\_Model::loadIntoMemory('view', Object(IPS\Member), Array)
#4 /home/admin/web/domen.ru/public_html/applications/forums/modules/front/forums/forums.php(34): IPS\forums\_Forum::loadIntoMemory()
#5 /home/admin/web/domen.ru/public_html/system/Dispatcher/Controller.php(96): IPS\forums\modules\front\forums\_forums->manage()
#6 /home/admin/web/domen.ru/public_html/system/Dispatcher/Dispatcher.php(129): IPS\Dispatcher\_Controller->execute()
#7 /home/admin/web/domen.ru/public_html/index.php(13): IPS\_Dispatcher->run()
#8 {main}

#0 /home/admin/web/domen.ru/public_html/init.php(508): IPS\_Log::log('SELECT * FROM `...', 'uncaught_except...')
#1 [internal function]: IPS\IPS::exceptionHandler(Object(IPS\Db\Exception))
#2 {main}

Got error 28 from storage engine
SELECT * FROM `forums_forums` LEFT JOIN `core_permission_index` ON core_permission_index.app=? AND core_permission_index.perm_type=? AND core_permission_index.perm_type_id=forums_forums.id LEFT JOIN `core_members` ON core_members.member_id=forums_forums.last_poster_id WHERE min_posts_view<=? AND (sub_can_post=0 OR can_view_others=1) AND (( FIND_IN_SET(2,perm_view) ) OR perm_view=? ) ORDER BY position
Array
(
    [0] => forums
    [1] => forum
    [2] => 0
    [3] => *
)

 | File                                                                       | Function                                                                      | Line No.          |
 |----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------|
 | /system/Db/Db.php                                                          | [IPS\Db\_Exception].__construct                                               | 432               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /system/Db/Select.php                                                      | [IPS\_Db].preparedQuery                                                       | 346               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /system/Db/Select.php                                                      | [IPS\Db\_Select].runQuery                                                     | 408               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /system/Node/Model.php                                                     | [IPS\Db\_Select].rewind                                                       | 410               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /applications/forums/sources/Forum/Forum.php                               | [IPS\Node\_Model].loadIntoMemory                                              | 718               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /applications/forums/modules/front/forums/topic.php                        | [IPS\forums\_Forum].loadIntoMemory                                            | 51                |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /system/Dispatcher/Controller.php                                          | [IPS\forums\modules\front\forums\_topic].manage                               | 96                |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /system/Content/Controller.php                                             | [IPS\Dispatcher\_Controller].execute                                          | 51                |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /applications/forums/modules/front/forums/topic.php                        | [IPS\Content\_Controller].execute                                             | 40                |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /system/Dispatcher/Dispatcher.php                                          | [IPS\forums\modules\front\forums\_topic].execute                              | 129               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | /index.php                                                                 | [IPS\_Dispatcher].run                                                         | 13                |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'

#0 /home/admin/web/domen.ru/public_html/system/Db/Exception.php(109): IPS\_Log::log('Got error 28 fr...', 'sql')
#1 /home/admin/web/domen.ru/public_html/system/Db/Db.php(432): IPS\Db\_Exception->__construct('Got error 28 fr...', 1030, NULL, 'SELECT * FROM `...', Array)
#2 /home/admin/web/domen.ru/public_html/system/Db/Select.php(346): IPS\_Db->preparedQuery('/*IPS\\Node\\_Mod...', Array)
#3 /home/admin/web/domen.ru/public_html/system/Db/Select.php(408): IPS\Db\_Select->runQuery()
#4 /home/admin/web/domen.ru/public_html/system/Node/Model.php(410): IPS\Db\_Select->rewind()
#5 /home/admin/web/domen.ru/public_html/applications/forums/sources/Forum/Forum.php(718): IPS\Node\_Model::loadIntoMemory('view', Object(IPS\Member), Array)
#6 /home/admin/web/domen.ru/public_html/applications/forums/modules/front/forums/topic.php(51): IPS\forums\_Forum::loadIntoMemory()
#7 /home/admin/web/domen.ru/public_html/system/Dispatcher/Controller.php(96): IPS\forums\modules\front\forums\_topic->manage()
#8 /home/admin/web/domen.ru/public_html/system/Content/Controller.php(51): IPS\Dispatcher\_Controller->execute()
#9 /home/admin/web/domen.ru/public_html/applications/forums/modules/front/forums/topic.php(40): IPS\Content\_Controller->execute()
#10 /home/admin/web/domen.ru/public_html/system/Dispatcher/Dispatcher.php(129): IPS\forums\modules\front\forums\_topic->execute()
#11 /home/admin/web/domen.ru/public_html/index.php(13): IPS\_Dispatcher->run()
#12 {main}

Как устранить ошибку?

Вот такие ошибки стали появляться:

UPDATE `core_advertisements` core_advertisements  SET ad_impressions=ad_impressions+1 WHERE ad_id IN(1,6,7,5) 
IPS\Db\Exception: Lock wait timeout exceeded; try restarting transaction (1205)
#0 /home/admin/web/domen.ru/public_html/system/Db/Db.php(991): IPS\_Db->preparedQuery('/*IPS\\core\\_Adv...', Array)
#1 /home/admin/web/domen.ru/public_html/applications/core/sources/Advertisement/Advertisement.php(305): IPS\_Db->update('`core_advertise...', 'ad_impressions=...', 'WHERE ad_id IN(...')
#2 /home/admin/web/domen.ru/public_html/system/Output/Output.php(755): IPS\core\_Advertisement::updateImpressions()
#3 /home/admin/web/domen.ru/public_html/system/Dispatcher/Dispatcher.php(149): IPS\_Output->sendOutput('\x1F\x8B\x08\x00\x00\x00\x00\x00\x00\x03\xED}{s\e...', 200, 'text/html', Array)
#4 /home/admin/web/domen.ru/public_html/system/Dispatcher/Standard.php(104): IPS\_Dispatcher->finish()
#5 /home/admin/web/domen.ru/public_html/system/Dispatcher/Front.php(528): IPS\Dispatcher\_Standard->finish()
#6 /home/admin/web/domen.ru/public_html/system/Dispatcher/Dispatcher.php(131): IPS\Dispatcher\_Front->finish()
#7 /home/admin/web/domen.ru/public_html/index.php(13): IPS\_Dispatcher->run()
#8 {main}

Форум тормозит.

Что это за ошибки?