Does close index free up disk or memory


I am using elasticsearch6.5 as single node, using 8GB of JVM and just 3% of memory is free. Will closing index using close API help to free heap memory .please tell what are the advantages of close index

Technically yes, but the warning in the 6.8 docs also applies to 6.5: indices should only be closed on a temporary basis.

Also 6.5 is long past the end of its supported life, you should upgrade as a matter of urgency.

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Thanks a lot !! It helped

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