Add Set Max Heap Size as a clojure til.

README.md

@@ -14,6 +14,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Open JavaDocs](clojure/open-javadocs.md)
 - [Quick Clojure Docs](clojure/quick-clojure-docs.md)
 - [Reductions](clojure/reductions.md)
+- [Set Max Heap Size](clojure/set-max-heap-size.md)
 - [Specify the Directory of a Shell Command](clojure/specify-the-directory-of-a-shell-command.md)
 - [Splitting On Whitespace](clojure/splitting-on-whitespace.md)
 - [Swap Two Items in a Vector](clojure/swap-two-items-in-a-vector.md)

clojure/set-max-heap-size.md

@@ -0,0 +1,11 @@
+# Set Max Heap Size
+
+For `lein`-based projects, the maximum heap size can be set by including the
+`-Xmx` option in the `jvm-opts` portion of the `project.clj` file. For
+instance, to set the maximum JVM heap size to 2 gigabytes, include:
+
+```clojure
+  :jvm-opts ["-Xmx2g"]
+```
+
+in your `project.clj` file.