Mark, Raj - Thank you both for coming back on that request of mine so promptly - I feel that I have a surfeit of riches!
peter edinburgh > -----Original Message----- > From: Mark Leith [mailto:[EMAIL PROTECTED] > Sent: Thursday, December 18, 2003 2:54 PM > To: Multiple recipients of list ORACLE-L > Subject: RE: Checking that the instance is up > > > Hi Peter, > > I remember the thread, but couldn't remember the subject line at all.. > > Having had this discussion countless times in the past, > here's what I would > opt for: > > The best way to make sure that an instance is alive and > running would be to > do a full connection to that instance, and run a simple piece > of sql - such > as "select 'PING' from dual;". This makes sure that both the > listener, and > instance are both up and readily accepting connections. > > You can also monitor for the listener status separately, based upon a > "TNSPING <SID>" command, that will alert simply to the status of the > listener. > > We do both of these with our monitoring tool, and generate > ENTITY_DOWN and > NETWORK_DOWN alerts respectively. If you get both an ENTITY_DOWN and > NETWORK_DOWN error message at the same time, then this helps > to point you at > the listener quicker than trying to diagnose why the instance > is down. If > you just get an ENTITY_DOWN message on it's own, then it points to a > database based problem. > > You should also try and catch the error messages on a > failure, and flag > those in your warning messages. > > And of course, there is the point of monitoring the monitor. > You should have > some process in place that is making sure that the monitor is > up and running > correctly. Whether this be a date/timestamp placed in to a > log file with > every successful "ping", or making sure a cron/AT job is running etc. > depends on how you do this.. > > Of course, you could buy a tool that already does all of this.. ;) > > HTH > > Mark > > > > > -----Original Message----- > Robson, Peter > Sent: 18 December 2003 13:59 > To: Multiple recipients of list ORACLE-L > > > Folks - > > Some months ago there were exchanges on the optimum way to > check that an > instance was alive. > > I have searched, hunted and generally scavenged for these > exchanges, but > without luck. > > Can anyone give me the subject line, and I can turn again to > the archive? > > thanks, > > peter > edinburgh > > > ********************************************************************* > This e-mail message, and any files transmitted with it, are > confidential and intended solely for the use of the addressee. 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You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Robson, Peter INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
