Jaroslav Kamenik created CASSANDRA-8231:
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Summary: Wrong size of cached prepared statements
Key: CASSANDRA-8231
URL: https://issues.apache.org/jira/browse/CASSANDRA-8231
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: Jaroslav Kamenik
Cassandra counts memory footprint of prepared statements for caching purposes.
It seems, that there is problem with some statements, ie SelectStatement. Even
simple selects is counted as 100KB object, updates, deletes etc have few
hundreds or thousands bytes. Result is that cache -
QueryProcessor.preparedStatements - holds just fraction of statements..
I dig a little into the code, and it seems that problem is in jamm in class
MemoryMeter. It seems that if instance contains reference to class, it counts
size of whole class too. SelectStatement references EnumSet through
ResultSet.Metadata and EnumSet holds reference to Enum class...
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