I am currently using logstash 5.1.1 on CentOS 7 sending it into execution from a bash shell. When using logstash 2.3.4 I was able to run several instances each one with a different maximum heap size, by making use of the LS_HEAP_SIZE environment variable (together with --allow-env option). With 5.1.…

You can set the heap size via environment variable, LS_JAVA_OPTS I use the following in our startup script. export LS_JAVA_OPTS=" -Xmx4g -Xms4g" From first few lines of bin/logstash scrip, see line 13: $ cat -n bin/logstash 1 #!/bin/sh 2 # Run logstash from source 3 # 4 …

Unable to set heap size via LS_HEAP_SIZE on logstash 5.1.1

Elastic Stack Logstash

magnusbaeck (Magnus Bäck) January 12, 2017, 6:13pm 2

together with --allow-env option

--allow-env has nothing to do with the JVM options.

I am able to change the heap by editing config/jvm.options file, but this has the inconvenience that the value contained in that file is used for each started instance.

Perhaps this thread is useful:

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Unable to set heap size via LS_HEAP_SIZE on logstash 5.1.1

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