Need to view some Videos of yours to understand snapper. Jonathan above
provided some good interpretation based on snapper information shared with him.
TxSanjay On Monday, May 20, 2019, 9:45:15 PM EDT, Tanel Poder
<tanel@xxxxxxxxxxxxxx> wrote:
Adding a comment regarding Snapper runtime:
This is a RAC database, when using Snapper without the @instance_number syntax,
it uses V$SESSION and other V$ views, for example:
@snapper all 5 1 SID
@snapper all 5 1 username=BLAH
When using Snapper with @instance_number syntax, it uses GV$ views:
@snapper all 5 1 SID@2
@snapper all 5 1 username=BLAH@2
Depending on the filter conditions (@RAC instance syntax and not looking just
for one SID) may make the data collection GV$ queries somewhat more complicated
and they make take some time. Btw, usually I run snapper for 5 seconds (or
more)...
--Tanel Poderhttps://blog.tanelpoder.com/seminar/
On Mon, May 20, 2019 at 7:01 AM Jonathan Lewis <jonathan@xxxxxxxxxxxxxxxxxx>
wrote:
Sanjay,
I don't use snapper often enough to be sure of exactly how it works, but your
figures for a "1 second single snapshot" suggest that it took nearly 2 seconds
to do a one second snapshot - which could indicate that the machine is
overloaded and work outside the work you are doing is impacting in your attempt
to load data.
