Number of active users | Minimum and maximum sessions | Session ratio |
---|---|---|
1 - 15 | 2 - 5 | 4 |
15 - 50 | 4 - 10 | 5 |
50 - 100 | 6 - 13 | 8 |
100 - 200 | 8 - 20 | 10 |
200+ | 10+ | 10 - 20 |
Under some circumstances, all sessions in the session pool might be busy and unavailable for new requests. In particular, when you run many reports, back-end sessions run more slowly, which prevents other requests from being completed. When session pools are busy, the user receives this message:
Failed to get a session: Exceeded retry limit.
This message indicates that there is a server configuration issue.
Under normal usage patterns, the delivered software has a maximum heap size setting sufficient to support about 200 active users, each making a request every 5 - 10 minutes. If the web server process exceeds this threshold, performance might degrade. To resolve this issue, change that threshold to a more appropriate number, based on experimentation.