Github user kkhatua commented on the issue:
https://github.com/apache/drill/pull/922
@ppadma Can you please review this?
The changes have been tested with and without the parameter.
If the env variable is set as `40%` , `drillbit.out` reports
```
Aug 25, 2017 4:30:59 PM org.glassfish.jersey.server.ApplicationHandler
initialize
INFO: Initiating Jersey application, version Jersey: 2.8 2014-04-29
01:25:26...
2017-08-25 16:32:19 [ERROR] Unable to start Drillbit due to memory
constraint violations
Max Memory Permitted : 40% (11 of 28 GB free memory)
Total Memory Requested : 26 GB
Check the following settings to possibly modify (or increase the Max
Memory Permitted):
-Xmx8g
-XX:MaxDirectMemorySize=16g
-XX:ReservedCodeCacheSize=1G
-XX:MaxPermSize=512M
```
If the env variable is set as `10240m` , `drillbit.out` reports
```
2017-08-25 16:35:18 [ERROR] Unable to start Drillbit due to memory
constraint violations
Max Memory Permitted : 10 GB
Total Memory Requested : 26 GB
Check the following settings to possibly modify (or increase the Max
Memory Permitted):
-Xmx8g
-XX:MaxDirectMemorySize=16g
-XX:ReservedCodeCacheSize=1G
-XX:MaxPermSize=512M
```
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