Provide a parameter to update memory allocation

[gnzsnz]

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Provide a mechanism to Increase Memory Size for TWS. Default value does not support complex mosaic screens, with multiple charts.

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Have an environment variable with the desired memory value, ex TWS_JAVA_HEAP=1024

a script should replace line starting by -Xmx with the provided value

# maximum Java heap size
-Xmx768m

replace by

# maximum Java heap size
-Xmx1024m

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Additional context

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[gnzsnz]

An option to set the memory allocatio is to

1. download the vmoptions file from the container

   docker cp tws:/opt/ibkr/ibgateway/10.26.1h/ibgateway.vmoptions .

2. update manually

   # maximum Java heap size
   -Xmx1024m

3. map the file as a volume in docker-compose.yml

...
  volumes:
    - ./ibgateway.vmoptions:/opt/ibkr/ibgateway/10.26.1h/ibgateway.vmoptions

[gnzsnz]

script POC

TWS_HEAP_SIZE=1024;export TWS_HEAP_SIZE
sed -i "s/-Xmx768m/-Xmx${TWS_HEAP_SIZE}m/g" tws.vmoptions