Memory trouble

Your Mac gets slow#

Instances' memory can't be paged out, so too much of it leaves macOS short.

• Hibernate instances you aren't using — suspended ones still hold their memory.
• Lower their memory on the Overview tab — especially above the three-fifths warning.
• Use dynamic memory, so idle instances give memory back.

Programs in Linux get killed#

When Linux runs out of memory it stops a program to survive — often the biggest one. Linux images don't use swap, so there's no slow fallback first.

• Raise the instance's memory (manual), or its maximum (dynamic), then restart it.
• On dynamic memory, the live readout's Guest stalling on memory shows when it's struggling.