{"id":188,"date":"2010-06-15T09:23:49","date_gmt":"2010-06-15T08:23:49","guid":{"rendered":"http:\/\/www.nax.cz\/2010\/06\/15\/zenoss-252-performence-probelms\/"},"modified":"2010-06-15T09:23:49","modified_gmt":"2010-06-15T08:23:49","slug":"zenoss-252-performence-probelms","status":"publish","type":"post","link":"https:\/\/nax.cz\/?p=188","title":{"rendered":"Zenoss 2.5.2 performence problems"},"content":{"rendered":"<p>Last week I upgraded our Zenoss (network and server monitoring system) from 2.4.x to 2.5.2 version. As a results zenoss services became very unstable &#8211; lot of alerts about (zensnmp) heartbeat failure, web interface inaccessible for some time (minutes) and holes in graphs.<\/p>\n<p>When I investigated the problem, I noticed almost all 4G physical memory is consumed (which might not be a problem &#8211; caches tends to fill whole memory in Linux for better performance), but the problem was that also 4G swap tend to be about 1\/2 consumed. <\/p>\n<p>When I checked load (uptime), I got a bit over 5, but CPU itself was utilized just for about 20%. Classical waits for heavy IO &#8211; swapping. We increased a physical memory (to 8G) and zenoss is stable again.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Last week I upgraded our Zenoss (network and server monitoring system) from 2.4.x to 2.5.2 version. As a results zenoss services became very unstable &#8211; lot of alerts about (zensnmp) heartbeat failure, web interface inaccessible for some time (minutes) and holes in graphs. When I investigated the problem, I noticed almost all 4G physical memory [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,24],"tags":[62,67,80,85],"class_list":["post-188","post","type-post","status-publish","format-standard","hentry","category-linux","category-zenoss","tag-memory","tag-performance","tag-swapping","tag-zenoss"],"_links":{"self":[{"href":"https:\/\/nax.cz\/index.php?rest_route=\/wp\/v2\/posts\/188","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nax.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nax.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nax.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nax.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=188"}],"version-history":[{"count":0,"href":"https:\/\/nax.cz\/index.php?rest_route=\/wp\/v2\/posts\/188\/revisions"}],"wp:attachment":[{"href":"https:\/\/nax.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nax.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nax.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}