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When using the silentpay and orderresult services, there are performance limitations (the number of requests processed per unit of time):

silentpay service processes up to 60 requests per second;
orderresult service processes up to 100 requests per second.

If the specified request rate is exceeded, the maximum additional waiting time in the queue is 5 seconds (the first 8-16 requests will pass without additional waiting).

If the queue size is exceeded, a response with HTTP code 429 is issued:

<html>
<head><title>429 Too Many Requests</title></head>
<body>
<center><h1>429 Too Many Requests</h1></center>
<hr><center>nginx</center>
</body></html>

These limits are system-wide and cannot be changed upon request.