Subject | Re[2]: [Firebird-Architect] blobs causes table fragmentation. |
---|---|
Author | Dmitry Kuzmenko |
Post date | 2004-10-05T13:04:11Z |
Hello, Dmitry!
Tuesday, October 5, 2004, 3:18:23 PM, you wrote:
DY> 65% of tables have avg fill ratio less than 80%.
DY> 30% of tables have avg fill ratio less than 70%.
And tables with record size ~12 bytes have avg fill ratio less than
60% after restore (worse than any other tables), independently of
database page size (tested).
--
Dmitri Kouzmenko
Tuesday, October 5, 2004, 3:18:23 PM, you wrote:
>> If there is any difference from average 80% fillDY> Avg fill ratio is 53-85% on a freshly restored real database.
>> ratio, then it's caused by data change pattern. Engine always do its best
>> to keep 80% fill ratio. Take a gstat look at freshly restored database.
DY> 65% of tables have avg fill ratio less than 80%.
DY> 30% of tables have avg fill ratio less than 70%.
And tables with record size ~12 bytes have avg fill ratio less than
60% after restore (worse than any other tables), independently of
database page size (tested).
--
Dmitri Kouzmenko