[2172] set mem_info to None in OSX before overwriting

diff --git a/src/lib/python/isc/sysinfo/sysinfo.py b/src/lib/python/isc/sysinfo/sysinfo.py
index c3238142a9f0925da5cb7406277c663eb321930a..1a79acade0b6b1d36cddb80cd266296fd9872b14 100644 (file)
--- a/src/lib/python/isc/sysinfo/sysinfo.py
+++ b/src/lib/python/isc/sysinfo/sysinfo.py
@@ -425,6 +425,7 @@ class SysInfoOSX(SysInfoFreeBSDOSX):
         # was read. However, on OSX, physmem is not necessarily the correct
         # value. But since it does not fail and does work on most BSD's, it's
         # left in the base class and overwritten here
+        self._mem_total = None
         try:
             s = subprocess.check_output(['sysctl', '-n', 'hw.memsize'])
             self._mem_total = int(s.decode('utf-8').strip())