Time: 12:00-17:00 UTC everyday
Location: China
The delay of APNs's response: The elapse from sending a notification to APNs Server to receiving a response from it.
Normal delay: 500ms
High delay: 10s-700s
Through put: 50/s
Description:
1. One of my servers' delay is very high (even up to 700 seconds), but another server's delay just slightly increase.
2. Even though the delay is very high, the responses indicate that the most of notifications was post successfully.
3. Restarting my push service will immediately reduce the delay.