Opening read-only Environment

Question

Hi,
I have following settings to open an read-only and non-transactional environment.
          EnvironmentConfig envConfig = new EnvironmentConfig();
          envConfig.setTransactional(false);
          envConfig.setLocking(false);
          envConfig.setReadOnly(true);
          DatabaseConfig dbConfig = new DatabaseConfig();
          dbConfig.setTransactional(false);
          dbConfig.setReadOnly(true);
          Database catalogDb = env.openDatabase(null, "catalog", dbConfig);
          catalog = new StoredClassCatalog(catalogDb);
          keyBinding = TupleBinding
                    .getPrimitiveBinding(Integer.class);
dataBinding = new SerialBinding(catalog, Object.class);
          db = env.openDatabase(null, "hellowworld", dbConfig);
It takes varying time to open an environment, say on average ~1 sec.
Currently the database size is ~200MB
Is it possible to reduce the time to open an read-only environment ?
Am I missing any other parameters?
Thanks,

Answer 1

Hi,
Open time can be adjusted by checkpoint frequency. You should ensure that when the environment was opened r/w that it was closed cleanly (and therefore a checkpoint was performed). I suggest that if you are unsure if your environment was shutdown cleanly that you re-open it read-write and call Environment.close() on it. Or better yet, just to be sure, call Environment.checkpoint() on it before you call close().
Let me know if that reduces the open time.
Regards,
Charles Lamb