mongodb- - Related information

• How does mongodb handle concurrent requests?

  WeChat Pay document mentioned: before checking and processing business data, data locks should be used for concurrency control. In order to avoid data confusion caused by function reentry, the Wechat server notifies the same payment result with a frequen...

  WeChat-Pay-developed-in-the-background-of node.js mongodb-

  Mar.30,2021
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-64f5-1be9ad3-319b6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be9ad3-319b6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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