How to increase Java heap size for SOLR in a Linux environment

Original Question or Issue:

 I was able to complete the Solr configuration. However, the indexed file count is -1

Environment:

• Product - FileCloud Server
• Version - Any
• Platform - Any

Steps to Reproduce:

Error or Log Message:

Fatal error: OutOfMemory encountered: Java heap space

Defect or Enhancement Number:

Cause:

SOLR crashes with an out-of-memory error. In some installations with large numbers of files (especially text-based documents), the heap memory is insufficient.

Resolution or Workaround:

• Edit the file " /etc/default/solr.in.sh ".
• Look for the line below.
  
  #SOLR_JAVA_MEM="-Xms512m -Xmx512m"
• Uncomment it, and increase the value depending on the resource available on your machine. If possible, change it to SOLR_JAVA_MEM="-Xms6144m -Xmx6144m".
• After making changes, save the file and restart the Solr service by running the command below:

    # service solr restart

Notes: