celery-beat process make the CPU usage too high

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PID | USER | PR | NI | VIRT | RES | SHR | S | %CPU | %MEM | TIME+ | COMMAND
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
20961 | root | 20 | 0 | 331288 | 185604 | 11756 | S | 85.7 | 9.5 | 9:17.11 | celery


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