Tomcat High Concurrency Effects

When there is too much concurrency in Tomcat, the following effects will occur:

1. Decreased performance: a high volume of concurrency can cause the Tomcat server to become overloaded, potentially leading to decreased performance, longer response times, and even issues such as request timeouts.
2. Increase in memory usage: Having too many concurrent requests can lead to the Tomcat server processing multiple requests at the same time, consuming a large amount of memory resources, potentially resulting in an increase in memory usage, or even memory overflow.
3. System crash: When the concurrency level is too high, the Tomcat server may not be able to handle such pressure, resulting in a system crash and causing it to malfunction.
4. When the connection pool is exhausted, having too much concurrency can deplete the connections in the Tomcat connection pool, causing it to be unable to accept new connections, thus impacting the system’s availability.
5. Unstable service: Excessive concurrent requests can make the Tomcat server unstable, leading to issues such as lost requests, data loss, and impacting user experience.