temp

packages/commonwealth/scripts/get-max-old-space-size.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# This file can be used to determine the proper max_old_space_size for a
+# Heroku dyno. If the total ram is available then use 75% of it otherwise use
+# the node default of 4GB. If the script throws an error at any point it will return a default of 1.5 GB
+
+{
+  # retrieves a Heroku dyno's total ram
+  # https://help.heroku.com/TWBM7DL0/how-do-i-measure-current-memory-use-and-max-available-memory-on-a-dyno-in-a-private-space
+  MEMORY_LIMIT=$(echo -n "$(</sys/fs/cgroup/memory/memory.limit_in_bytes)")
+
+  ######## parsing the multiplier - this section will always yield a MULTIPLIER set to 1 or a decimal number ##########
+  # if the multiplier is not given set multiplier to 1 (no effect)
+  if ! [ "$1" ]; then
+    MULTIPLIER=1
+  # if the multiplier is given but it is not a number (integer or decimal) then set multiplier to 1 (no effect)
+  elif [ "$1" ] && ! [[ $1 =~ ^[0-9]+$ ]] && ! [[ $1 =~ ^[0-9]*\.?[0-9]+$ ]]; then
+     MULTIPLIER=1
+  # if the multiplier is given and it is a number the use it
+  else
+    MULTIPLIER=$1
+  fi
+
+  DEFAULT_PERCENT=80
+
+  # if ram can be retrieved and it is greater than 400MB then return 70% of it
+  # the -gt check ensures that the max_old_space_size will never be set to a tiny value if the method of retrieving
+  # the total ram breaks
+  if [ "$MEMORY_LIMIT" ] && [ "$MEMORY_LIMIT" -gt 400000000 ]; then
+    # rounds the MAX_OLD_SPACE_SIZE
+    MAX_OLD_SPACE_SIZE=$(awk "BEGIN {print int($MULTIPLIER*$MEMORY_LIMIT*$DEFAULT_PERCENT/100000000); exit}")
+
+    # this if-else section ensures that the money multiplier does not increase memory beyond 95% of what is available
+    # or decrease under 400MB
+    if [ $MAX_OLD_SPACE_SIZE -gt $(awk "BEGIN {printf \"%.0f\", $MEMORY_LIMIT*0.95; exit}") ] || [ $MAX_OLD_SPACE_SIZE -lt 400 ]; then
+      # default to 70%
+      echo $(($MEMORY_LIMIT*$DEFAULT_PERCENT/100000000))
+    else
+      # set to [70*MULTIPLIER]% of total ram on the dyno
+      echo $MAX_OLD_SPACE_SIZE
+    fi
+  else
+    MAX_OLD_SPACE_SIZE=$(awk "BEGIN {print int($MULTIPLIER*4096); exit}")
+    if [ "$MAX_OLD_SPACE_SIZE" -gt 10000 ] || [ "$MAX_OLD_SPACE_SIZE" -lt 400 ]; then
+      # default to 4GB on local development
+      echo 4090
+    else
+      echo $MAX_OLD_SPACE_SIZE
+    fi
+  fi
+} || {
+  echo 1500;
+}
+