Проблема с квотами памяти

Начал просматривать свои логи нашел подозрительные : MJ12bot , AhrefsBot, SputnikBot которые пожирали 30% памяти ! (если найдете у себя смотрите куда они лезут, скорее всего там вирусы)
Сейчас удалось снизить нагрузку в 3 раза (с 600мб до 150мб). Всем советую прописать сразу.

В htaccess прописал: (на robots.txt их ПОХ оказалось)

## Блокировка по USER AGENT:
RewriteCond %{HTTP_USER_AGENT} MJ12bot [OR]
RewriteCond %{HTTP_USER_AGENT} Java [OR]
RewriteCond %{HTTP_USER_AGENT} NjuiceBot [OR]
RewriteCond %{HTTP_USER_AGENT} Gigabot [OR]
RewriteCond %{HTTP_USER_AGENT} Baiduspider [OR]
RewriteCond %{HTTP_USER_AGENT} JS-Kit [OR]
RewriteCond %{HTTP_USER_AGENT} Voyager [OR]
RewriteCond %{HTTP_USER_AGENT} PostRank [OR]
RewriteCond %{HTTP_USER_AGENT} PycURL [OR]
RewriteCond %{HTTP_USER_AGENT} Aport [OR]
RewriteCond %{HTTP_USER_AGENT} ia_archiver [OR]
RewriteCond %{HTTP_USER_AGENT} DotBot [OR]
RewriteCond %{HTTP_USER_AGENT} SurveyBot [OR]
RewriteCond %{HTTP_USER_AGENT} larbin [OR]
RewriteCond %{HTTP_USER_AGENT} Butterfly [OR]
RewriteCond %{HTTP_USER_AGENT} libwww [OR]
RewriteCond %{HTTP_USER_AGENT} Wget [OR]
RewriteCond %{HTTP_USER_AGENT} SWeb [OR]
RewriteCond %{HTTP_USER_AGENT} LinkExchanger [OR]
RewriteCond %{HTTP_USER_AGENT} Soup [OR]
RewriteCond %{HTTP_USER_AGENT} WordPress [OR]
RewriteCond %{HTTP_USER_AGENT} PHP/ [OR]
RewriteCond %{HTTP_USER_AGENT} spbot [OR]
RewriteCond %{HTTP_USER_AGENT} MLBot [OR]
RewriteCond %{HTTP_USER_AGENT} InternetSeer [OR]
RewriteCond %{HTTP_USER_AGENT} FairShare [OR]
RewriteCond %{HTTP_USER_AGENT} Yeti [OR]
RewriteCond %{HTTP_USER_AGENT} Birubot [OR]
RewriteCond %{HTTP_USER_AGENT} YottosBot [OR]
RewriteCond %{HTTP_USER_AGENT} gold crawler [OR]
RewriteCond %{HTTP_USER_AGENT} Linguee [OR]
RewriteCond %{HTTP_USER_AGENT} Ezooms [OR]
RewriteCond %{HTTP_USER_AGENT} lwp-trivial [OR]
RewriteCond %{HTTP_USER_AGENT} Purebot [OR]
RewriteCond %{HTTP_USER_AGENT} User-Agent [OR]
RewriteCond %{HTTP_USER_AGENT} kmSearchBot [OR]
RewriteCond %{HTTP_USER_AGENT} SiteBot [OR]
RewriteCond %{HTTP_USER_AGENT} CamontSpider [OR]
RewriteCond %{HTTP_USER_AGENT} ptd-crawler [OR]
RewriteCond %{HTTP_USER_AGENT} HTTrack [OR]
RewriteCond %{HTTP_USER_AGENT} suggybot [OR]
RewriteCond %{HTTP_USER_AGENT} ttCrawler [OR]
RewriteCond %{HTTP_USER_AGENT} Nutch [OR]
RewriteCond %{HTTP_USER_AGENT} bingbot [OR]
RewriteCond %{HTTP_USER_AGENT} msnbot [OR]
RewriteCond %{HTTP_USER_AGENT} Ezooms [OR]
RewriteCond %{HTTP_USER_AGENT} psbot [OR]
RewriteCond %{HTTP_USER_AGENT} msnbot-UDiscovery [OR]
RewriteCond %{HTTP_USER_AGENT} Flamingo_SearchEngine [OR]
RewriteCond %{HTTP_USER_AGENT} statdom.ru [OR]
RewriteCond %{HTTP_USER_AGENT} AhrefsBot [OR]
RewriteCond %{HTTP_USER_AGENT} Zeus
RewriteRule ^(.*)$ – [F,L]