Notes

Depending on the SQL statement that is executed, more ports will be required than the calculated target value.
If the number of ports allocated automatically by the operating system is insufficient, respecify the number in the pd_registered_port operand.
When HiRDB releases port numbers, the OS does not necessarily release the numbers immediately (TIME_WAIT status). Therefore, the system will sometimes temporarily use a larger number of port numbers than the target number. For details about how to avoid a shortage of ports caused by the TIME_WAIT status, see 23.4.4 Ways to avoid a shortage of ports.
In the following systems, reduce the number of ports used to connect UAPs to HiRDB using the high-speed connection facility. For details about the high-speed connection facility, see the HiRDB Version 9 UAP Development Guide.
- Systems in which the value of pd_max_users exceeds 400
- Systems with more than 32 back-end servers
- Systems with more than 32 front-end server
- Systems with more than 64 units
When the system configuration includes numerous back-end servers within the system, the calculated value might exceed the operating system's upper limit for port numbers or the port number specified in pd_registered_port. For details about the corrective action to take in this situation, see 9.5 Considerations that apply to building a system with many units or servers. You can also use the BES connection holding facility. For details about the BES connection holding facility, see the HiRDB Version 9 System Operation Guide.

23.4.2 Notes