Why TKPROF gives same output for every TRC file as copied below. Though size of TRC files are different.

OUTPUT of TKPROF :-

TKPROF: Release 8.1.5.0.0 - Production on Fri Feb 23 17:55:24 2001

(c) Copyright 1999 Oracle Corporation. All rights reserved.

Trace file: orclsmon.trc
Sort options: default

********************************************************************************
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
********************************************************************************
Trace file: orclsmon.trc
Trace file compatibility: 7.00.12
Sort options: default

3 sessions in tracefile.
0 user SQL statements in trace file.
0 internal SQL statements in trace file.
0 SQL statements in trace file.
0 unique SQL statements in trace file.
94147 lines in trace file.