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https://issues.apache.org/jira/browse/SOLR-9753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Høydahl closed SOLR-9753.
-----------------------------
    Resolution: Cannot Reproduce

Cannot reproduce, lots have changed. Please re-open if you still encounter this.

> Admin UI - Memory Graph on Dashboard shows NaN for unused Swap
> --------------------------------------------------------------
>
>                 Key: SOLR-9753
>                 URL: https://issues.apache.org/jira/browse/SOLR-9753
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Admin UI, JSON Request API
>    Affects Versions: 5.1
>            Reporter: adeppa
>            Assignee: Alexandre Rafalovitch
>
> If the System doesn't use Swap, the displayed memory graph on the dashboard 
> shows NaN (not a number) because it tries to divide by zero.
> admin url : solr/collection/admin/system?wt=json&&indent=true
> "system":{
>     "name":"Linux",
>     "version":"3.13.0-48-generic",
>     "arch":"amd64",
>     "systemLoadAverage":0.0,
>     "committedVirtualMemorySize":27111653376,
>     "freePhysicalMemorySize":48219590656,
>     "freeSwapSpaceSize":0,
>     "processCpuTime":67938650000000,
>     "totalPhysicalMemorySize":67548606464,
>     "totalSwapSpaceSize":0,
>     "openFileDescriptorCount":213,
>     "maxFileDescriptorCount":4096,
>     "uname":"Linux ip-172-22-65-57 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 
> 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux\n",
>     "uptime":" 06:33:04 up 57 days, 20:20,  0 users,  load average: 0.00, 
> 0.01, 0.05\n"}}



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