Memory usage has doubled!

Before 7/20 I was using about 126 mb of ram a day.

Since 7/22 I have been using over 230 mb of ram a day - my PS is getting maxed out.

I haven’t added any new software - i have mostly a few wordpress installations running.

How might I troubleshoot this and discover the root cause of the RAM consumption?

Maybe we have the same issues with DH: