symstat SRDF QLen value

Hi

I was looking to see if anyone had more detail on the QLen on the SRDF output from symstat.

RDF Group Level I/O Statistics:

         GRP       IO/sec        MB/sec    % Hits   IO Service Time (usec)    Q
16:34:09        READ   WRITE   READ  WRITE     RD    Min        Max    Avg  Len
16:34:18  12       0    2202      0     19      0      0    6570574   1009    3
16:34:24  12       0    2198      0     19      0      0    6570574   1017    6
16:34:30  12       0    1935      0     17      0      0    6570574   1008    5

Can someone advise if there is a STP equivalent to this? or what would be deemed high? I would assume the larger the Q the higher the latency seen by the host.

Cheers

Al