1 files changed, 69 insertions, 0 deletions
diff --git a/ambari-metrics/ambari-metrics-host-monitoring/src/main/python/psutil/examples/meminfo.py b/ambari-metrics/ambari-metrics-host-monitoring/src/main/python/psutil/examples/meminfo.py
new file mode 100644
index 0000000000..671f907caf
--- /dev/null
+++ b/ambari-metrics/ambari-metrics-host-monitoring/src/main/python/psutil/examples/meminfo.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Print system memory information.
+
+$ python examples/meminfo.py
+MEMORY
+------
+Total      :    9.7G
+Available  :    4.9G
+Percent    :    49.0
+Used       :    8.2G
+Free       :    1.4G
+Active     :    5.6G
+Inactive   :    2.1G
+Buffers    :  341.2M
+Cached     :    3.2G
+
+SWAP
+----
+Total      :      0B
+Used       :      0B
+Free       :      0B
+Percent    :     0.0
+Sin        :      0B
+Sout       :      0B
+"""
+
+import psutil
+from psutil._compat import print_
+
+
+def bytes2human(n):
+    # http://code.activestate.com/recipes/578019
+    # >>> bytes2human(10000)
+    # '9.8K'
+    # >>> bytes2human(100001221)
+    # '95.4M'
+    symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
+    prefix = {}
+    for i, s in enumerate(symbols):
+        prefix[s] = 1 << (i + 1) * 10
+    for s in reversed(symbols):
+        if n >= prefix[s]:
+            value = float(n) / prefix[s]
+            return '%.1f%s' % (value, s)
+    return "%sB" % n
+
+
+def pprint_ntuple(nt):
+    for name in nt._fields:
+        value = getattr(nt, name)
+        if name != 'percent':
+            value = bytes2human(value)
+        print_('%-10s : %7s' % (name.capitalize(), value))
+
+
+def main():
+    print_('MEMORY\n------')
+    pprint_ntuple(psutil.virtual_memory())
+    print_('\nSWAP\n----')
+    pprint_ntuple(psutil.swap_memory())
+
+if __name__ == '__main__':
+    main()