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

From: Paul Drake <discgolfdba_at_yahoo.com>
Date: Mon, 22 Dec 2003 20:04:25 -0800
Message-ID: <F001.005DAAA0.20031222200425@fatcity.com>

Murali Vallath <murali_vallath_at_yahoo.com> 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?

more layers in the OSI stack, longer code path. try passing the argument (# of attempts) to tnsping to see if its consistently high, e.g.:

D:\Oracle\Ora92\bin>tnsping mydb 5

TNS Ping Utility for 32-bit Windows: Version 9.2.0.4.0 - Production on 22-DEC-20
03 23:03:38

Used parameter files:
D:\Oracle\Ora92\network\admin\sqlnet.ora

Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)
(HOST = badmofo)(PORT = 1551))) (CONNECT_DATA =
(SERVICE_NAME = mydb.mydomain.com)))

OK (110 msec)
OK (30 msec)
OK (10 msec)
OK (20 msec)
OK (10 msec)

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Author: Paul Drake
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Received on Mon Dec 22 2003 - 22:04:25 CST