IM 服务器怀疑存在内存泄露问题

After the IM Server restarts, it runs for several days, and the memory usage suddenly increases (in an abnormal trend, it may be only 3-4G in the previous few days, and it may increase by several G in half a day by the third or fourth day). This leads to a high CPU utilization rate, which should not be caused by insufficient performance, because after the restart, it can still run stably for several days. How should this problem be solved or investigated?