Hi,

> jdbc:h2:/tmp/prod/
> h2cache;TRACE_LEVEL_FILE=3;CACHE_SIZE=1048576;LOCK_MODE=3;MVCC=TRUE;MULTI_THREADED=0

This means MULTI_THREADED is disabled in your case.

> But I am opening and using several Sessions, concurrently, from
> different threads .

This shouldn't be a problem.

> I believe, for MVCC=TRUE, you are synchronizing in sessions, not
> database

No, in this case access is synchronized on 'database'. See also
Command.java, methods executeQueryLocal and executeUpdate. You can
also find the places where isMultiVersion and getMultiThreaded is
used.

Regards,
Thomas

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