Re: TNSPING VS. REGULAR PING..! WHY SUCH A DIFFERENCE

Paul mentioned a few reasons for this.

Another is that a ping does not get past the NIC. The ping is answered by software running on the card. You may have noticed at times that a ping is not a reliable method for determining if a server is still functioning.

The OS can crash, but the NIC still responds to a ping.

Tnsping on the other hand must get a response from Oracle Net service or daemon running on the server, a much longer path as Paul pointed out.

HTH Jared

On Mon, 2003-12-22 at 17:29, Murali Vallath wrote:
> I have recently noticed in this one situation that there is a great difference between a tnsping vs a regular ping to the same server.
>
> for example this tnsping took about 270 ms which is strange and its consistent
>
> Used TNSNAMES adapter to resolve the alias
> Attempting to contact (DESCRIPTION = (ADD
> RESS_LIST = (load_balance = on) (failover = on) (ADDRESS = (PROTOCOL = TCP)(HOST
> = myhost1.com)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = myhost2.com)(
> PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = xyzdb) (FAILOVER_MODE = (TYPE
> = SELECT) (METHOD = BASIC) (RETRIES = 20) (DELAY = 15))))
> OK (270 msec)
>
> and a ping to the same host
>
> Ping statistics for x.x.x.x:
> Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
> Approximate round trip times in milli-seconds:
> Minimum = 61ms, Maximum = 70ms, Average = 67ms
>
> Why could there be such a difference?
>
>
>
>
>
>
>
> ---------------------------------
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Author: Jared Still
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