---In firebird-support@yahoogroups.com, <michkurc@...> wrote : > In my box in isql mode ( win7_x64, dedicated ssd drive for databases) > default db configuration > > is still difference between 2.5 and 3.0:for select first 1000000 * > (now over 100% of time fb 2.5) > > > //2.5 > SQL> select count(*) from t1; ... > Elapsed time= 4.44 sec Buffers = 2048 Reads = 37865 ... > SQL> select first 1000000 * from t1 order by id desc; ... > Elapsed time= 22.34 sec > Buffers = 2048 > Reads = 37869 ... > // 3.0 ... > Elapsed time= 5.143 sec > Buffers = 2048 > Reads = 80764 ... > SQL> select first 1000000 * from t1 order by id desc; ... > Elapsed time= 55.905 sec > Buffers = 2048 > Reads = 80701
It is strange that FB3 reads 2 times more than FB2.5. You show that page size is the same in both databases (16KB). What about charset of varchar field ? gstat -r also could be useful to see. Regards, Vlad
