Can’t pint point Large Memory Leak

Hello,

I’ve worked on developing a website for a client. But there seems to be a rather large memory leak.

There’s a bunch of admin-ajax executions running on the site which are taking up about 300mb each.

I’ve already tried uninstalling all the plugins and the theme. I’ve also disabled the heartbeat API entirely. But none of that helped.

Can anyone point me in the right direction in resolving this issue?

Thank you!