Isn't maxtrans of 255 ( default )sufficient ? ----- Original Message ----- From: "sol beach" <sol.beach@xxxxxxxxx> To: <mosicr@xxxxxxxxxx> Cc: <oracle-l@xxxxxxxxxxxxx>; <ryan_gaffuri@xxxxxxxxxxx> Sent: Sunday, April 17, 2005 9:18 PM Subject: Re: Subject: Batch load freezes every couple of minutes >Instance runs 20 parallel load processes You might be encountering enqueue waits. Typically INITRANS=1 for tables & 2 for indexes (YMMV). Unless & until the session holding the Interested Transaction Lock releases it, other sessions will quietly get into line waiting for it to be released. This is NOT a deadlock & won't be reported as one. HTH & HAND! On 4/17/05, ryan_gaffuri@xxxxxxxxxxx <ryan_gaffuri@xxxxxxxxxxx> wrote: > Please provide your definition of 'hang'? To see if your processes are still running look in v$sess_io, if the values there are incrementing, then processing is still going on. > you need to find out what the processes are doing at the point that they are freezing? Best way is to get a 10046 trace of one of the processes dumped to a file. Another alternative is to use statspack of before the 'hang' and then another snapshot afterward and look at what sql is processing. > > you mentioned that the times that you have problems are when you have lock waits. you could have 1 process doing something for a long time and aquiring a lock on a row. the rest of the processes require that row and have to wait for a commit or rollback. > > the v$ tables(other than a quick look at v$sess_io) probably won't be helpful here. you need to know exactly what is going on when this occurs. > > -- > //www.freelists.org/webpage/oracle-l > -- //www.freelists.org/webpage/oracle-l