okumin commented on code in PR #5884:
URL: https://github.com/apache/hive/pull/5884#discussion_r2160230839
##########
conf/hive-env.sh.template:
##########
@@ -18,18 +20,29 @@
# to control the execution of Hive. It should be used by admins to configure
# the Hive installation (so that users do not have to set environment variables
# or set command line parameters to get correct behavior).
-#
-# The hive service being invoked (CLI etc.) is available via the environment
-# variable SERVICE
+# Set HADOOP_HOME to point to a specific hadoop install directory
+# HADOOP_HOME=${bin}/../../hadoop
+
+# Hive Configuration Directory can be controlled by:
+# export HIVE_CONF_DIR=
+
+# Folder containing extra libraries required for hive compilation/execution
can be controlled by:
+# export HIVE_AUX_JARS_PATH=
+
+# HIVE Log Directory can be controlled by and ensure it exists on the
filesystem:
+# export HIVE_LOG_DIR=
+
+# The hive service being invoked (beeline etc.) is available via the
environment
+# variable SERVICE
# Hive Client memory usage can be an issue if a large number of clients
-# are running at the same time. The flags below have been useful in
+# are running at the same time. The flags below have been useful in
# reducing memory usage:
-#
-# if [ "$SERVICE" = "cli" ]; then
+
+# if [ "$SERVICE" = "beeline" ]; then
# if [ -z "$DEBUG" ]; then
-# export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xms10m
-XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:+UseParNewGC
-XX:-UseGCOverheadLimit"
+# export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xms10m
-XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:+G1GC
-XX:-UseGCOverheadLimit"
Review Comment:
`-XX:+UseG1GC` is the correct one?
##########
conf/hive-env.sh.template:
##########
@@ -18,18 +20,29 @@
# to control the execution of Hive. It should be used by admins to configure
# the Hive installation (so that users do not have to set environment variables
# or set command line parameters to get correct behavior).
-#
-# The hive service being invoked (CLI etc.) is available via the environment
-# variable SERVICE
+# Set HADOOP_HOME to point to a specific hadoop install directory
+# HADOOP_HOME=${bin}/../../hadoop
+
+# Hive Configuration Directory can be controlled by:
+# export HIVE_CONF_DIR=
+
+# Folder containing extra libraries required for hive compilation/execution
can be controlled by:
+# export HIVE_AUX_JARS_PATH=
+
+# HIVE Log Directory can be controlled by and ensure it exists on the
filesystem:
+# export HIVE_LOG_DIR=
+
+# The hive service being invoked (beeline etc.) is available via the
environment
+# variable SERVICE
# Hive Client memory usage can be an issue if a large number of clients
-# are running at the same time. The flags below have been useful in
+# are running at the same time. The flags below have been useful in
# reducing memory usage:
-#
-# if [ "$SERVICE" = "cli" ]; then
+
+# if [ "$SERVICE" = "beeline" ]; then
# if [ -z "$DEBUG" ]; then
-# export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xms10m
-XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:+UseParNewGC
-XX:-UseGCOverheadLimit"
+# export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xms10m
-XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:+G1GC
-XX:-UseGCOverheadLimit"
Review Comment:
Can we remove `-XX:+G1GC` since it's the default with JDK 17+? I also see
[-XX:NewRatio is not
recommended](https://docs.oracle.com/en/java/javase/21/gctuning/garbage-first-garbage-collector-tuning.html#GUID-0BB3B742-A985-4D5E-A9C5-433A127FE0F6).
However, as I don't know the intention of the DEBUG option, we may keep it.
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