Does Java Berkeley DB have an upper limit for concurrent reading?
<p>Java Berkeley DB is used in my system to store persistent data.</p>

<p>Since I have a large amount of data to be loaded, I attempt to do that with a number of threads. When the number of threads is low, e.g., 10, it works fine. However, when it is set to a higher value, e.g., 30, the reading processes get stuck. It looks like the Java Berkeley DB has an upper limit for concurrency reading? Am I right? How would I update the limit?</p>