Strapi v4 + Postgres + Render.com = Error "Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?"

Questions and Answers Strapi Backend
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I have the same issue when i apply this command npm run develop to start the strapi my cpu is going high to 175% when i check the htop the mysqld used my cpu load when i stop the command cpu load came down.
this message come
Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?
KnexTimeoutError: Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?

Please help if you know what is the issue