diff --git a/base/timing.jl b/base/timing.jl
index c7870ac491169..4f5af767c5b2a 100644
--- a/base/timing.jl
+++ b/base/timing.jl
@@ -16,6 +16,8 @@ struct GC_Num
     collect         ::Csize_t # GC internal
     pause           ::Cint
     full_sweep      ::Cint
+    max_pause       ::Int64
+    max_memory      ::Int64
 end
 
 gc_num() = ccall(:jl_gc_num, GC_Num, ())
diff --git a/src/gc.c b/src/gc.c
index d4af5f443764c..10a0a89e12d88 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -3225,6 +3225,11 @@ static int _jl_gc_collect(jl_ptls_t ptls, jl_gc_collection_t collection)
     gc_time_sweep_pause(gc_end_t, actual_allocd, live_bytes,
                         estimate_freed, sweep_full);
     gc_num.full_sweep += sweep_full;
+    uint64_t max_memory = last_live_bytes + gc_num.allocd;
+    if (max_memory > gc_num.max_memory) {
+        gc_num.max_memory = max_memory;
+    }
+
     gc_num.allocd = 0;
     last_live_bytes = live_bytes;
     live_bytes += -gc_num.freed + gc_num.since_sweep;
@@ -3244,6 +3249,9 @@ static int _jl_gc_collect(jl_ptls_t ptls, jl_gc_collection_t collection)
     gc_num.total_time += pause;
     gc_num.since_sweep = 0;
     gc_num.freed = 0;
+    if (pause > gc_num.max_pause) {
+        gc_num.max_pause = pause;
+    }
     reset_thread_gc_counts();
 
     return recollect;
@@ -3393,6 +3401,8 @@ void jl_gc_init(void)
     gc_num.interval = default_collect_interval;
     last_long_collect_interval = default_collect_interval;
     gc_num.allocd = 0;
+    gc_num.max_pause = 0;
+    gc_num.max_memory = 0;
 
 #ifdef _P64
     // on a big memory machine, set max_collect_interval to totalmem / ncores / 2
diff --git a/src/gc.h b/src/gc.h
index d50e32c1a0444..858cafa6cec07 100644
--- a/src/gc.h
+++ b/src/gc.h
@@ -72,6 +72,8 @@ typedef struct {
     size_t      interval;
     int         pause;
     int         full_sweep;
+    uint64_t    max_pause;
+    uint64_t    max_memory;
 } jl_gc_num_t;
 
 enum {