How to fill the valley with message queue

I know that message queues can cut the front and fill the valley

message queue sharpening is easy to understand. Message queuing can limit traffic when a large number of requests are sent. Protect the back end.

but how to understand filling grain

Java rabbitmq rocketmq
Mar.12,2021

where is the clipped peak? Do you understand if you think so?

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b2bf9f-40065.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2bf9f-40065.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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