# When run logstash, it promts "Invalid initial heap size: -Xms5g"
**URL:** https://discuss.elastic.co/t/when-run-logstash-it-promts-invalid-initial-heap-size-xms5g/149214
**Category:** Logstash
**Created:** [September 20, 2018, 3:48am UTC](https://discuss.elastic.co/t/when-run-logstash-it-promts-invalid-initial-heap-size-xms5g/149214 "2018-09-20T03:48:01Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Zhao](https://discuss.elastic.co/u/Zhao)
#### Post date: [September 20, 2018, 3:48am UTC](https://discuss.elastic.co/t/when-run-logstash-it-promts-invalid-initial-heap-size-xms5g/149214/1 "2018-09-20T03:48:01Z")
As my computer has 32g memory, so I changed the jvm.options to increase the memory of logstash.
jvm.options is
-Xms5g
-Xmx8g
but after change the jvm.options , it promts the belowing error when run logstash.
root@EC2-ELK-IE-PROD-2 logstash]# /usr/share/logstash/bin/logstash --path.settings=/etc/logstash -r -w 8 -b 2000 -d
Invalid initial heap size: -Xms5g
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
When I googled, many people met this problem because of the 32bit java version.
But my java version is already 64bits.
[root@EC2-ELK-IE-PROD-2 elasticsearch]# java -version
openjdk version "1.8.0\_181"
OpenJDK Runtime Environment (build 1.8.0\_181-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
Are therre any guys can give me some advice? Thanks very much.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 18, 2018, 3:48am UTC](https://discuss.elastic.co/t/when-run-logstash-it-promts-invalid-initial-heap-size-xms5g/149214/2 "2018-10-18T03:48:13Z")
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