lveps -p - interpreting the result

[p.bylina]

Im trying to figure out how tu summarize mem usage splited per process to total mem usage.

Output:

(api)[root@ace1 tpointapi]# lveps -p

ID     EP    PNO    PID    TNO    TID    CPU    MEM    I/O

as1trace      1     10    ---     14    ---      3  98872      0

---    ---  31645    ---  31645      0   9168    N/A

---    ---  31644    ---  31644      0   7092    N/A

---    ---  31633    ---  31633      0    804    N/A

---    ---  31632    ---  31632      0    500    N/A

---    ---  31425    ---  31427      0   2924    N/A

---    ---  31425    ---  31426      0   2924    N/A

---    ---  31425    ---  31425      0   2924    N/A

---    ---  30793    ---  30795      2  31384    N/A

---    ---  30793    ---  30793      0  31384    N/A

---    ---  30789    ---  30794      2  28708    N/A

---    ---  30789    ---  30789      1  28708    N/A

---    ---  30775    ---  30775      0    700    N/A

---    ---  30774    ---  30774      0    496    N/A

---    ---  15850    ---  15850      0   1300    N/A

So total mem usage for user as1trace = 98872 KB
but if I add mem usage for processes with different PID i have:

9168 + 7092 + 804 + 500 + 2924 + 31384 + 28708 + 700 + 496 + 1300 = 83076 KB

result after sum all MEM column = 120308 KB

Why the difference and how to interpret this?