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I will do some tests with the configuration that you have sent me to see if I can find out what the best settings are in your situation. I will get back to you when I have finished the tests.

Regards, Henk

Hello Bogdan,

If the one time password and bulk messages are sent with the same gateway(s), it would be normal that there is some delay of the OTP messages when the send queue is full with bulk messages, but the number of OTP messages in the queue and the delay should not increase this much.

I would like to see the configuration file of Diafaan SMS Server so that I can get a better idea of your system. You can send the file to email address dms@diafaan.com.

Regards, Henk

Hello Azhar,

In Diafaan SMS Server, messages with a higher priority are placed in front of the send queue. That does not necessarily mean that they are sent immediately, that depends on the state of the gateways.

Each gateway pre-loads a number of messages from the send queue so that they can be sent as fast and efficient as possible without overloading the send queue database. The 'MaximumBatchSize' setting of each gateway determines the maximum number of pre-loaded messages, when this buffer is half empty or less, the gateway loads a new batch of messages. This means that there can be a delay when a message with a higher priority is sent and the buffer in one of the gateways is not yet (half) empty.

The higher the throughput of a gateway is, the higher the 'MaximumBatchSize' should be to keep a steady and efficient message flow. But since the message flow of your GSM Modem Gateway is quite low, you can set the 'MaximumBatchSize' to a lower value without much performance loss. You can even set it to '1' if you do not have a lot of gateways and when the swift handling of priority messages is very important.

Regards, Henk