oops, spoke too soon. I now have two builds - one built using 10.2
(PB) and the other built using 10.4 (Xcode). I reboot into system
10.2, both builds work as expected. However, when booting into
system 10.4, both builds are sluggish (not just a little bit slow -
like 20 seconds to do a job that take 1-2 seconds under 10.2). The
same thing happens for a fresh install of 10.4 on a different
external drive.
Running from the shell also shows significant differences between the
systems. The following script, which creates a table and does 100
inserts, takes 4-5 times longer to run in system 10.4 than in system
10.2.
any further feedback welcome
regards
Peter
----- start of script -----
#!/bin/bash
myfile=~/test.db
/usr/local/bin/sqlite3 $myfile "create table table1( one varchar
(24), two smallint);";
/usr/local/bin/sqlite3 $myfile "delete from table1";
next=0
for ((i=1; i <= 100 ; i++))
do
/usr/local/bin/sqlite3 $myfile "insert into table1 (one, two) values
('some textual data - $i', $i)";
if (test $next -eq 9) then
next=0
echo "inserted $i items ..."
else
next=$(($next + 1))
fi
done
/usr/local/bin/sqlite3 $myfile 'select * from table1';
----- end of script -----
On 01/12/2005, at 9:45 PM, ozemail (pcferrett) wrote:
On 25/11/2005, at 7:14 PM, Jens Miltner wrote:
Hi Jens
These are some really good questions. I had to reinstall system
10.2 (with a little foresight, probably should have had installed
the systems on different partitions in the first place). I rebuilt
the files with project builder in 10.2. The app worked fine. This
build also worked fine when rebooting in system 10.4. I then
rebuilt the app in system 10.2 linking to the sqlite build I did
under 10.4. This also worked fine. Magically, when rebooting into
10.4 and converting this PB project to xcode and rebuilding, the
build worked!
In summary, I have no idea what the original problem was, but its
working fine now. Thanks for the tips and feedback all.
Peter
Peter,
no hot resolution tip here, but a couple of points you may want to
investigate:
- Are you sure it's related to your move to Mac OS X 10.4?
- Did you try the same query with the same database in your 10.2
build?
- If the updated app is still running on 10.2 - what are the
results if running on 10.2?
I have tried killing spolight and disabling dashboard widgets. no
luck there.
- If it's related to 10.4 - are you sure no other background
service is doing disk i/o (spotlight's comes to mind)?
- Did you try the same query/queries with the sqlite3 commandline
executable for comparison?
I am using make to build sqlite with the default build style
- Since apparently you're not using make to build sqlite: when you
build with deployment build style, did you define NDEBUG=1 ?
BTW: we're using sqlite 3.2.7 on 10.4 and I don't see this kind of
sluggishness, but anyway sqlite performance certainly also depends
on the data & schema of the database being used, so results can't
be compared unless the same database is used...
</jum>
