diff --git a/.zshenv b/.zshenv
index 5551ee5..fbcfd04 100644
--- a/.zshenv
+++ b/.zshenv
@@ -1,3 +1,9 @@
 export PATH="$HOME/.rbenv/bin:$PATH"
 eval "$(rbenv init -)"
 eval "$(/Users/esinclair/github/zendesk/z/bin/z init -)"
+# Big app GC tuning
+export RUBY_HEAP_MIN_SLOTS=1000000
+export RUBY_HEAP_SLOTS_INCREMENT=1000000
+export RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
+export RUBY_GC_MALLOC_LIMIT=1000000000
+export RUBY_HEAP_FREE_MIN=500000