diff --git a/clients/client-linux.py b/clients/client-linux.py
index cb2b6c7..e15d4d8 100755
--- a/clients/client-linux.py
+++ b/clients/client-linux.py
@@ -40,11 +40,8 @@ def get_memory():
             continue
         key, value = match.groups(['key', 'value'])
         result[key] = int(value)
-    # mem used refer to: htop software
-    # https://stackoverflow.com/questions/41224738/how-to-calculate-system-memory-usage-from-proc-meminfo-like-htop
     MemTotal = float(result['MemTotal'])
-    MemExactCache = float(result['Cached'])+float(result['SReclaimable'])-float(result['Shmem'])
-    MemUsed = MemTotal-float(result['MemFree'])-(float(result['Buffers'])+MemExactCache)
+    MemUsed = MemTotal-float(result['MemFree'])-float(result['Buffers'])-float(result['Cached'])-float(result['SReclaimable'])
     SwapTotal = float(result['SwapTotal'])
     SwapFree = float(result['SwapFree'])
     return int(MemTotal), int(MemUsed), int(SwapTotal), int(SwapFree)