24 lines
671 B
OCaml
24 lines
671 B
OCaml
(* Copyright (C) 2015, Thomas Leonard <thomas.leonard@unikernel.com>
|
|
See the README file for details. *)
|
|
|
|
let src = Logs.Src.create "memory_pressure" ~doc:"Memory pressure monitor"
|
|
module Log = (val Logs.src_log src : Logs.LOG)
|
|
|
|
let fraction_free stats =
|
|
let { Xen_os.Memory.free_words; heap_words; _ } = stats in
|
|
float free_words /. float heap_words
|
|
|
|
let init () =
|
|
Gc.full_major ()
|
|
|
|
let status () =
|
|
let stats = Xen_os.Memory.quick_stat () in
|
|
if fraction_free stats > 0.5 then `Ok
|
|
else (
|
|
Gc.full_major ();
|
|
Xen_os.Memory.trim ();
|
|
let stats = Xen_os.Memory.quick_stat () in
|
|
if fraction_free stats < 0.6 then `Memory_critical
|
|
else `Ok
|
|
)
|