GitHub user kkhatua opened a pull request:
https://github.com/apache/drill/pull/922
DRILL-5741: During startup Drill should not exceed the available memory
Providing an environment variable - DRILLBIT_MAX_PROC_MEM to ensure that a
Drillbit's max memory parameters, cumulatively, don't exceed the value
specified.
The variable can be defined in KB, MB, or GB; similar in syntax to how the
JVM MaxHeap is specified.
e.g.
```
DRILLBIT_MAX_PROC_MEM=13G
DRILLBIT_MAX_PROC_MEM=8192m
DRILLBIT_MAX_PROC_MEM=4194304K
```
In addition, you can specify it as a percent of the available free memory
prior to the Drillbit starting up:
`DRILLBIT_MAX_PROC_MEM=40%
`
For a system with with 28GB free memory, when set to 40% the Drillbit (with
settings defined in drill-env.sh) fails startup with the following message:
```
2017-08-25 14:58:57 [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
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kkhatua/drill DRILL-5741
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/922.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #922
----
commit 04b04d8e4b0c24fef053bbbd6ecebfaebad99d9c
Author: Kunal Khatua <kkha...@maprtech.com>
Date: 2017-08-25T23:35:37Z
DRILL-5741: During startup Drill should not exceed the available memory
Providing an environment variable - DRILLBIT_MAX_PROC_MEM to ensure that a
Drillbit's max memory parameters, cumulatively, don't exceed the value
specified.
The variable can be defined in KB, MB, or GB; similar in syntax to how the
JVM MaxHeap is specified.
e.g.
```
DRILLBIT_MAX_PROC_MEM=13G
DRILLBIT_MAX_PROC_MEM=8192m
DRILLBIT_MAX_PROC_MEM=4194304K
```
In addition, you can specify it as a percent of the available free memory
prior to the Drillbit starting up:
`DRILLBIT_MAX_PROC_MEM=40%
`
For a system with with 28GB free memory, when set to 40% the Drillbit (with
settings defined in drill-env.sh) fails startup with the following message:
```
2017-08-25 14:58:57 [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
```
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