# \#dbvisualizer

**URL:** https://community.cdata.com/tag/dbvisualizer/277.md

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## [“java.lang.OutOfMemoryError” when using JDBC driver on a tool](https://community.cdata.com/t/java-lang-outofmemoryerror-when-using-jdbc-driver-on-a-tool/431)

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**Author:** [@Dardi\_R](https://community.cdata.com/u/Dardi_R)\
**Replies:** 0\
**Last updated:** [October 3, 2023, 7:32pm UTC](https://community.cdata.com/t/java-lang-outofmemoryerror-when-using-jdbc-driver-on-a-tool/431 "2023-10-03T19:32:38Z")

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When performing memory-intensive queries like joining two tables that contain a large number of rows, it sometimes exceeds the heap memory allocated by the tool configuration settings, resulting in an Out of Memory error…