Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
MapReduce >> mail # user >> How are 'PHYSICAL_MEMORY_BYTES' and 'VIRTUAL_MEMORY_BYTES' calculated?


Copy link to this message
-
Re: How are 'PHYSICAL_MEMORY_BYTES' and 'VIRTUAL_MEMORY_BYTES' calculated?
Thanks for the response. So they represent the total physical memory
(virtual memory) has been allocated to the job (e.g., from heap and stack)
during its entire life time? I am still confused how to get the cumulative
number from /proc/meminfo. I think from /proc/meminfo we can only get the
memory usage of a  process in a particular time point (looked like a
snapshot of the status of the process). If these numbers are added, the sum
would be much more than memory allocated to the program.
On Fri, Jul 12, 2013 at 6:47 AM, Shahab Yunus <[EMAIL PROTECTED]>wrote:

> I think they are cumulative but per task.
>
> Physical memory bytes
> (PHYSICAL_MEMORY_BYTES)
> The physical memory being used by a task in bytes, as reported by
> /proc/meminfo.
> Virtual memory bytes
> (VIRTUAL_MEMORY_BYTES)
> The virtual memory being used by a task in bytes, as reported by
> /proc/meminfo.
>
> This is from the Definitive Guide book. Page 260.
>
> Regards,
> Shhab
>
>
> On Thu, Jul 11, 2013 at 12:47 PM, hadoop qi <[EMAIL PROTECTED]> wrote:
>
>> Hello,
>>
>> I am wondering how memory counters  'PHYSICAL_MEMORY_BYTES'  and
>> 'VIRTUAL_MEMORY_BYTES'  are calculated? They are peaks of memory usage or
>> cumulative usage?
>>
>> Thanks for help,
>>
>
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB