Strange problem with PostgreSQL database in Common LISP

The previous distributed compilation and releaseProgramIt uses sbcl + clsql + MySQL and is basically normal. In this statistical back-end, the database switched to ipvs and continued to use clsql to connect. The result was a very crazy problem:

 

After Postgres is connected to clsql, the query can be normal, but after a few minutes, it may be that the database connection is disconnected or times out. If another connection is created, a strange phenomenon will occur: sbcl memory usage continues to grow, knowing that the entire machine is stuck when all the system memory is consumed.

 

I tried clsql's various connection parameter combinations, and none of them can solve this problem. Finally, I switched to the postmodern library, and now I am working properly.