diff --git a/memleak/memory-consumption-over-time.gp b/memleak/memory-consumption-over-time.gp
index feb3615..5b4f2d0 100755
--- a/memleak/memory-consumption-over-time.gp
+++ b/memleak/memory-consumption-over-time.gp
@@ -4,7 +4,11 @@
 #   | awk '{print "USS:", $4; print "PSS:",$5; print "RSS:",$6; print "SWP:",$3;}' \
 #   | sed "s/:/ $(date --iso-8601=minutes)/" >> mem-myprogram.data
 #
-# Arguments: <program name> <time of first data point> [width] [height]
+# Arguments: <program name> <time of first data point> [ytic mode] [width] [height]
+# Argument 3 (ytic mode) means:
+#     - default: 1 tic every 10 MiB, 1 mtic every 5 MiB.
+#     -     big: 1 tic every 100 MiB, 1 mtic every 10 MiB.
+#     - verybig: 1 tic every 1000 MiB, 1 mtic every 100 MiB.
 # Example usage: ./memory-consumption-over-time.gp myprogram 2021-12-05T08:42
 
 if (ARGC < 2) {
@@ -25,9 +29,21 @@ if (ARGC >= 2) {
     mystarttime = strptime(mytimefmt, ARG2)
 }
 
+myytics = 10                    # 1 tic every 10 MiB.
+mymytics = 2                    # 1 mtic every 5 MiB.
+if (ARGC >= 3) {
+    if (ARG3 eq "big") {
+        myytics = 100           # 1 tic every 100 MiB.
+        mymytics = 10           # 1 mtic every 10 MiB.
+    }
+    if (ARG3 eq "verybig") {
+        myytics = 1000          # 1 tic every 1000 MiB.
+        mymytics = 10           # 1 mtic every 10 MiB.
+    }}
+
 array mysize[2] = [ 1200, 900 ]
-if (ARGC >= 4) {
-    array mysize[2] = [ ARG3, ARG4 ]
+if (ARGC >= 5) {
+    array mysize[2] = [ ARG4, ARG5 ]
 }
 
 set title sprintf('%s memory consumption over time', myprog)
@@ -43,10 +59,10 @@ set xtics format "%tH"
 
 set xtics 21600                 # 1 tic every 6 hours.
 set mxtics 6                    # 1 mtic every hour.
-set ytics 10 nomirror           # 1 tic every 10 MiB.
-set mytics 2                    # 1 mtic every 5 MiB.
-set y2tics 10 nomirror textcolor 'dark-red'
-set my2tics 2
+set ytics myytics nomirror
+set mytics mymytics
+set y2tics myytics nomirror textcolor 'dark-red'
+set my2tics mymytics
 set grid xtics ytics mxtics mytics lc "gray50" lw 0.75, lc "gray" lw 0.5
 
 myfont = "Source Sans Pro,12"