How to solve the problem that the memory of sequelize connection cache is too high?

ask for help. The company"s project is divided into libraries according to business. After establishing a connection using sequelize, the connection cache is saved in memory. When there are many sub-libraries, the memory occupation is too high, is there any way to solve it? The Koa framework is used.
current idea: because sequelize will import model to establish table mapping. Each connection has the same model data. At present, I want to implement multiple database connections to share model objects to reduce memory footprint. But I don"t know how to do it. I ask the boss for advice.

Mar.10,2021
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-64f5-1b33268-2b3ba.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b33268-2b3ba.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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