lucene/lucene/SYSTEM_REQUIREMENTS.txt

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# System Requirements
Apache Lucene runs on Java 8 or greater.
It is also recommended to always use the latest update version of your
Java VM, because bugs may affect Lucene. An overview of known JVM bugs
can be found on http://wiki.apache.org/lucene-java/JavaBugs
With all Java versions it is strongly recommended to not use experimental
`-XX` JVM options.
CPU, disk and memory requirements are based on the many choices made in
implementing Lucene (document size, number of documents, and number of
hits retrieved to name a few). The benchmarks page has some information
related to performance on particular platforms.
*To build Apache Lucene from source, refer to the `BUILD.txt` file in
the distribution directory.*