Diff for Elasticsearch Homebrew formula, increasing available memory for Elasticsearch and default pool size for JVM's permanent generation. Basically it solves the problem with `java.lang.OutOfMemoryError: PermGen space` when running Elasticsearch.

elasticsearch.rb.diff

diff --git a/Library/Formula/elasticsearch.rb b/Library/Formula/elasticsearch.rb
index bed30bf..054c9ce 100644
--- a/Library/Formula/elasticsearch.rb
+++ b/Library/Formula/elasticsearch.rb
@@ -105,7 +105,11 @@ class Elasticsearch < Formula
           <key>EnvironmentVariables</key>
           <dict>
             <key>ES_JAVA_OPTS</key>
-            <string>-Xss200000</string>
+            <string>-Xss200000 -XX:PermSize=500m -XX:MaxPermSize=500m</string>
+            <key>ES_HEAP_SIZE</key>
+            <string>1g</string>
+            <key>ES_MAX_MEM</key>
+            <string>1g</string>
           </dict>
           <key>RunAtLoad</key>
           <true/>