How to change the initial VM memory usage (4096M)

[Sai Zhang <sz...@cs.washington.edu>]

Hi all:

   After I installed hive according to its instructions, and launched it
using command ./hive_home/bin/hive,  I
 found hive needs at least -Xmx4096 M memory to start. I am wondering is
there any way to change this
configuration to require less memory?

At least, I did not find a valid one using grep. Any suggestion is welcome.

thanks

-Sai

Re: How to change the initial VM memory usage (4096M)

[Edward Capriolo <ed...@gmail.com>]

That change my only be in trunk. Just in case he is referencing this. be
careful about lowering this. Queries with lots of AND/ORS will not compile
if you set this too low.

bin/ext/cli.sh
  else
      echo "Unable to determine Hadoop version information."
      echo "'hadoop version' returned:"
      echo `$HADOOP version`
      exit 6
  fi

  HADOOP_HEAPSIZE=4096
  HADOOP_OPTS="$HADOOP_OPTS -XX:-UseGCOverheadLimit"

  if [ $minor_ver -lt 20 ]; then
      exec $HADOOP jar $AUX_JARS_CMD_LINE ${HIVE_LIB}/hive-cli-*.jar $CLASS
$HIVE_OPTS "$@"
  else
      # hadoop 20 or newer - skip the aux_jars option. picked up from
hiveconf
      exec $HADOOP jar ${HIVE_LIB}/hive-cli-*.jar $CLASS $HIVE_OPTS "$@"
  fi



On Wed, May 26, 2010 at 2:26 PM, Ning Zhang <nz...@facebook.com> wrote:

> It is in bin/ext/cli.sh. search for 4096.
>
> On May 26, 2010, at 11:11 AM, Sai Zhang wrote:
>
> > Hi all:
> >
> >    After I installed hive according to its instructions, and launched it
> using command ./hive_home/bin/hive,  I
> >  found hive needs at least -Xmx4096 M memory to start. I am wondering is
> there any way to change this
> > configuration to require less memory?
> >
> > At least, I did not find a valid one using grep. Any suggestion is
> welcome.
> >
> > thanks
> >
> > -Sai
> >
>
>

Re: How to change the initial VM memory usage (4096M)

[Ning Zhang <nz...@facebook.com>]

It is in bin/ext/cli.sh. search for 4096.

On May 26, 2010, at 11:11 AM, Sai Zhang wrote:

> Hi all:
> 
>    After I installed hive according to its instructions, and launched it using command ./hive_home/bin/hive,  I
>  found hive needs at least -Xmx4096 M memory to start. I am wondering is there any way to change this
> configuration to require less memory?
> 
> At least, I did not find a valid one using grep. Any suggestion is welcome.
> 
> thanks
> 
> -Sai
>