check_mem plugin showing wroong values

[Nilesh Shastrakar]

Dear All,

The top output is showing the correct values of memory utilization 
If I check through the check_mem plugin it is wrong values 

could anyone help me to correct this problem 

Physical RAM on the system 1024MB

Top Out put 
Mem:   1026328k total,  1003880k used,    22448k free,    55760k buffers

and check_mem output
 
[root at test libexec]# ./check_mem -w 65 -c 90  -v
OK: 37% Used Memory - Total: 1002 MB, used: 374 MB, free: 628 MB | MemUsed=37%;65;90

Also I have attached herewith the check_mem plugin 

Thanks 
Nilesh 
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