I could not find an Oracle wait event named 'Parellel Sync Wait' (in v$event_name view in 7.3.4,
8.1.7.4, 9.2.0.4).
Precise may be calling something else a 'Parallel Sync Wait', or is smart enough to figure this
out when it seems Oracle isn't instrumented for this particular wait(?). Just pondering...
Does Presice on-line help have any mention of this wait?
Have you contacted Precise Tech Support?
- Kirti
- Jared.Still_at_radisys.com wrote:
> No other replies yet, so here goes.
>
> First of all, what does it really mean when you say:
>
> users are complaining that Precise is showing a whole lot of time in
> "Parallel Sync Wait".
>
> Are these end users, or developers? Seems rather curious that users would
> be mentioning this.
>
>
> Second, what % of wait time do the Sync Waits contribute to?
>
> If a small % of total, then there's not much point in spending time on it.
>
> Third, is this actually causing a performance problem, or is it just
> appearing
> as a 'trouble' item on some monitor?
>
> Jared
>
>
>
>
>
>
> mkline1_at_comcast.net
> Sent by: ml-errors_at_fatcity.com
> 01/20/2004 11:29 AM
> Please respond to ORACLE-L
>
>
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> cc:
> Subject: Parallel Query determined by?
>
>
> I've inherited a system that has a whole lot of indexes set to degree 10
> and many tables set to 2 & 4.
>
> The users are complaining that Precise is showing a whole lot of time in
> "Parallel Sync Wait".
>
> It is an HP box running 8.1.7.4 with 16 processors. The box is normally
> not very busy.
>
> Are there various init.ora settings that help the Parallel servers sync
> up, or is this just too high a setting?
>
> I'm suggesting we back of a good many of these things to simply 2 or 4 and
> then work our way up from there. Some of those indexes set to 10 are only
> 20 meg and 4 extents. There's no way they are getting 10 on that I would
> think.
>
> Can't find a whole lot on Metalink either. Or a good book on 800 gig
> warehouses using parallel?
>
> --
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Received on Wed Jan 21 2004 - 08:39:27 CST