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From "Dmitry Konstantinov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-7219) Reduce memory allocation in cassandra.persistence.PojoFieldAccessor
Date Sat, 16 Dec 2017 11:32:00 GMT
Dmitry Konstantinov created IGNITE-7219:
-------------------------------------------

             Summary: Reduce memory allocation in cassandra.persistence.PojoFieldAccessor
                 Key: IGNITE-7219
                 URL: https://issues.apache.org/jira/browse/IGNITE-7219
             Project: Ignite
          Issue Type: Improvement
          Components: cassandra
    Affects Versions: 2.3, 2.2, 2.1
            Reporter: Dmitry Konstantinov


As a part of store logic of CassandraCacheStore if strategy="POJO" is used to store a value
entity - org.apache.ignite.cache.store.cassandra.persistence.PojoFieldAccessor is used to
work with POJO properties. Within the methods getValue/setValue getReadMethod()/getWriteMethod()
are invoked each time. As a part of the methods invocation sun.reflect.misc.ReflectUtil#isNonPublicProxyClass
is triggered which works with class names as strings and allocates a memory. It is a small
allocation by itself but it is triggered very frequently - for each field for each entity
per each DB operation - so in summary it create a significant pressure. See attach:  

Suggestion: we can cache and reuse getReadMethod()/getWriteMethod() results as a part of constructor
logic of PojoFieldAccessor



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