{"action":"created","issue":{"url":"https://api.github.com/repos/elastic/elasticsearch/issues/19711","repository_url":"https://api.github.com/repos/elastic/elasticsearch","labels_url":"https://api.github.com/repos/elastic/elasticsearch/issues/19711/labels{/name}","comments_url":"https://api.github.com/repos/elastic/elasticsearch/issues/19711/comments","events_url":"https://api.github.com/repos/elastic/elasticsearch/issues/19711/events","html_url":"https://github.com/elastic/elasticsearch/issues/19711","id":168584884,"number":19711,"title":"Master: Netty4 rest tests take much longer under linux","user":{"login":"spinscale","id":667544,"avatar_url":"https://avatars.githubusercontent.com/u/667544?v=3","gravatar_id":"","url":"https://api.github.com/users/spinscale","html_url":"https://github.com/spinscale","followers_url":"https://api.github.com/users/spinscale/followers","following_url":"https://api.github.com/users/spinscale/following{/other_user}","gists_url":"https://api.github.com/users/spinscale/gists{/gist_id}","starred_url":"https://api.github.com/users/spinscale/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/spinscale/subscriptions","organizations_url":"https://api.github.com/users/spinscale/orgs","repos_url":"https://api.github.com/users/spinscale/repos","events_url":"https://api.github.com/users/spinscale/events{/privacy}","received_events_url":"https://api.github.com/users/spinscale/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/elastic/elasticsearch/labels/:Network","name":":Network","color":"009800"},{"url":"https://api.github.com/repos/elastic/elasticsearch/labels/test","name":"test","color":"5319e7"}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":12,"created_at":"2016-08-01T07:36:25Z","updated_at":"2016-08-03T15:42:56Z","closed_at":"2016-08-01T17:49:33Z","body":"**Elasticsearch version**: master\r\n\r\n**JVM version**: 1.8.0_91\r\n**OS version**:  Fedora 23, Ubuntu\r\n\r\n**Description of the problem including expected versus actual behavior**:\r\nRunning the netty 4 tests under fast linux boxes turns out to be much slower than under osx using a far slower notebook. Asked several other developers to verify on their linux workstations, where the same happened.\r\n\r\nI only have remote SSH access to a fast linux box and havent gotten a profiler running via SSH correctly yet, so my current findings are rather external. Will try to setup ASAP.\r\n\r\nTwo current findings, which I cannot yet make any sense of\r\n\r\n* I/O seems huge when the test runs. Running `dstat  -r -d -c --disk-util` while the test runs, shows a nearly 100% utilization of the disk, even though there are only 51MB of logs written after a full test run. The test ran on an SSD.\r\n* Running sysdig for 90 seconds (created 500MB logs) while the test was running, shows that it spends most time in `epoll` and `futex` system calls (far more time than the 90 seconds, so must be run in parallel), could not spot any huge file I/O however.\r\n\r\n**Steps to reproduce**:\r\n 1. `cd modules/transport-netty4`\r\n 2. `gradle integTest -Dtests.class='*.Netty4ClientYamlTestSuiteIT'`\r\n\r\nAlso, reducing the number of nodes from two to one makes the tests go faster (in both cases), but they are still of by a factor of two between that fast linux workstation and my notebook."},"comment":{"url":"https://api.github.com/repos/elastic/elasticsearch/issues/comments/237276833","html_url":"https://github.com/elastic/elasticsearch/issues/19711#issuecomment-237276833","issue_url":"https://api.github.com/repos/elastic/elasticsearch/issues/19711","id":237276833,"user":{"login":"s1monw","id":973334,"avatar_url":"https://avatars.githubusercontent.com/u/973334?v=3","gravatar_id":"","url":"https://api.github.com/users/s1monw","html_url":"https://github.com/s1monw","followers_url":"https://api.github.com/users/s1monw/followers","following_url":"https://api.github.com/users/s1monw/following{/other_user}","gists_url":"https://api.github.com/users/s1monw/gists{/gist_id}","starred_url":"https://api.github.com/users/s1monw/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/s1monw/subscriptions","organizations_url":"https://api.github.com/users/s1monw/orgs","repos_url":"https://api.github.com/users/s1monw/repos","events_url":"https://api.github.com/users/s1monw/events{/privacy}","received_events_url":"https://api.github.com/users/s1monw/received_events","type":"User","site_admin":false},"created_at":"2016-08-03T15:42:56Z","updated_at":"2016-08-03T15:42:56Z","body":"good @javanna "}}
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