From 82c2160fd2fa76cece04cb6e0a7261bcb6e73d91 Mon Sep 17 00:00:00 2001
From: Sebastian Sdorra <sebastian.sdorra@cloudogu.com>
Date: Mon, 4 Mar 2013 19:37:40 +0100
Subject: [PATCH] added script to analyze ehcache sizes

---
 .../scm-script-plugin/analyze-ehcache.groovy  | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 support/scm-script-plugin/analyze-ehcache.groovy

diff --git a/support/scm-script-plugin/analyze-ehcache.groovy b/support/scm-script-plugin/analyze-ehcache.groovy
new file mode 100644
index 0000000000..dd26cc423c
--- /dev/null
+++ b/support/scm-script-plugin/analyze-ehcache.groovy
@@ -0,0 +1,86 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+// see https://bitbucket.org/sdorra/scm-manager/issue/345/ehcache-eating-up-all-memory   
+
+def humanReadable(def bytes) {
+    if (bytes < 1024) return bytes + " B";
+    int exp = (int) (Math.log(bytes) / Math.log(1024));
+    String pre = "KMGTPE".charAt(exp-1);
+    return String.format("%.1f %sB", bytes / Math.pow(1024, exp), pre);
+}
+
+def sizeOf(Serializable object){
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    ObjectOutputStream oos = new ObjectOutputStream(baos);
+    oos.writeObject(object);
+    oos.close();
+    return baos.size();
+}
+
+Runtime runtime = Runtime.getRuntime();
+def maxMemory = runtime.maxMemory();
+def allocatedMemory = runtime.totalMemory();
+def freeMemory = runtime.freeMemory();
+
+println "memory:"
+println "  - max       : " + humanReadable(maxMemory);
+println "  - allocated : " + humanReadable(allocatedMemory);
+println "  - free      : " + humanReadable(freeMemory);
+
+println "";
+println "";
+
+def cacheManager = injector.getInstance(sonia.scm.cache.CacheManager.class).cacheManager;
+
+def totalCMax = 0;
+
+def cacheNames = cacheManager.getCacheNames();
+for ( def cacheName : cacheNames ){
+    def cache = cacheManager.getCache(cacheName);
+    def totalMemory = cache.calculateInMemorySize();
+    def average = cache.getSize() > 0 ? Math.round( totalMemory / cache.getSize() ) : 0;
+    def max = cache.getCacheConfiguration().getMaxEntriesLocalHeap();
+    def maxSize = average * max;
+    
+    totalCMax += maxSize;
+    
+    println cache.name + ":";
+    println "  - size    : " + cache.getSize();
+    println "  - maxsize : " + max;
+    println "  - average : " + humanReadable( average );
+    println "  - current : " + humanReadable( totalMemory );
+    println "  - cmax    : " + humanReadable( maxSize );
+}
+
+println "";
+println "";
+println "Total CMax: " + humanReadable(totalCMax);
\ No newline at end of file