FYI

We learned a lesson and i just wanna tell you.

Using HSQL for recovery log we saw a static memory usage increase by
logging the garbage collector (JVM_OPTIONS -verbose:gc -Xloggc:<file>
-XX:+PrintGCTimeStamps -XX:+PrintGCDetails ) after extensive write
operations.

First we thought it was a cache inside sequoia but it was HSQL, that was
used for the recovery log. The jdbc-url contained a db-file
configuration, but HSQL was configured to use "memory" tables. So the
recovery log was stored in memory and caused the memory usage increase
of the sequoia process. After a lot of write operations, the sequoia got
an Out of Memory.

We changed the HSQL properties to use "cached" tables and now everything
works fine.

Stefan


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