Re: Simple SQL waiting on 'log file sync'

You may want to drop those bit map indexes and create it after the load to see if there is a difference.
 and you may want to consider doing this for every run.  ~Arul

 On 11/18/05, Deepak Sharma <sharmakdeep_oracle_at_yahoo.com> wrote:
>
> I have a SQL statement as follows:
>
> INSERT INTO A1 SELECT * FROM B1;
>
> Table A1 has about 900K rows, 1 PK and has 4 Bitmap
> indexes.
>
> When I run the above from SQL*Plus with a 10046 trace,
> I see a lot of mesages as follows related to 'log file
> sync' :
>
> WAIT #1: nam='log file sync' ela= 59250 p1=9313 p2=0
> p3=0
>
> This statement usually completes in < 5 mins, but for
> last 2 days it's running continuously for several
> hours, and the only wait event I see is 'log file
> sync'.
>
> My question is:
>
> 1) Isn't 'log file sync' related to commits? In above
> I am not even commiting.
> 2) System-wide we are not seeing this wait event, but
> just for this session.
>
> Thanks,
> Deepak
>
>
>
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