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Srinivasa Reddy Vundela 9eb7096c47 [SPARK-22483][CORE] Exposing java.nio bufferedPool memory metrics to Metric System 
## What changes were proposed in this pull request?

Adds java.nio bufferedPool memory metrics to metrics system which includes both direct and mapped memory.

## How was this patch tested?
Manually tested and checked direct and mapped memory metrics too available in metrics system using Console sink.

Here is the sample console output

application_1509655862825_0016.2.jvm.direct.capacity
             value = 19497
application_1509655862825_0016.2.jvm.direct.count
             value = 6
application_1509655862825_0016.2.jvm.direct.used
             value = 19498

application_1509655862825_0016.2.jvm.mapped.capacity
             value = 0
application_1509655862825_0016.2.jvm.mapped.count
             value = 0
application_1509655862825_0016.2.jvm.mapped.used
             value = 0

Author: Srinivasa Reddy Vundela <vsr@cloudera.com>

Closes #19709 from vundela/SPARK-22483.
2017-11-09 16:05:47 -08:00
..
src [SPARK-22483][CORE] Exposing java.nio bufferedPool memory metrics to Metric System 2017-11-09 16:05:47 -08:00
pom.xml [SPARK-19112][CORE] Support for ZStandard codec 2017-11-01 14:54:08 +01:00