[GitHub] [incubator-doris] adonis0147 commented on a diff in pull request #9683: [fix]Set the memory size used when FE starts according to the user's available memory at startup

[GitBox <gi...@apache.org>]

adonis0147 commented on code in PR #9683:
URL: https://github.com/apache/incubator-doris/pull/9683#discussion_r876687681


##########
bin/start_fe.sh:
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@@ -132,13 +132,21 @@ fi
 
 # check java version and choose correct JAVA_OPTS
 java_version=$(jdk_version)
-final_java_opt=$JAVA_OPTS
+final_java_opt=$JAVA_OPTS_4G
+MemTotal=`free -g | grep "Mem"  | awk '{print $7}'`

Review Comment:
   The 7th item indicates the size of cached memory which may not be suitable.
   
   ```shell
   MemTotalInGB="$(cat /proc/meminfo | grep 'MemTotal' | awk '{print int($2 / 1024 / 1024)}')"
   MemAvailableInGB="$(cat /proc/meminfo | grep 'MemAvailable' | awk '{print int($2 / 1024 / 1024)}')"
   ```
   These metrics may be useful.
   
   MemTotalInGB = total
   MemAvailableInGB = free + buffers/cache



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