Virtual Graph import error

Support
1

Hello, I was trying to import a virtual graph from a PostgreSQL database into Stardog in order to gain better performance.
However, when importing the graph I got an OutOfMemoryError. I upgraded my machine to one with 128GB memory and the error still persists.

Any idea, how to fix this?

2

Would you supply the following log files from $STARDOG_HOME?

  • stardog.log
  • starrocks.log
  • data/LOG*

I can think of two possible cases off the top of my head:

  1. Stardog does not know you have 128G memory due to Java configuration
  2. Linux heap corruption is occurring (making it look like memory is gone).

The above logs will give a clear indication in both cases. And give us hints if this is a completely different case.

3

I receive stardog.log via another channel. Your Java config is still set for 4G.

This link should help: Capacity Planning | Stardog Documentation Latest

4

Thanks, I added this line in /etc/stardog.env.sh and it worked.

export STARDOG_SERVER_JAVA_ARGS="-Xms16g -Xmx16g -XX:MaxDirectMemorySize=40g"

However, when I tried to import a second virtual graph from Snowflake I got another error related to disk usage. I will describe it in a new topic.