Huge drop in freespace in the database

Hi all,
I experienced a strange problem. Recently I had a new server installed and the database from the old server was migrated in to the new server. After doing so, I added additional datafiles to the tablespaces to increase the free space in the database.
The volume of data transactions per day is more or less same for all days. After 2 years of data transactions, my 4000 MB datafile got depleted to around 500 MB freespace. Then two months back the new datafiles were added to increase the total size of the datafiles to 7000 MB. At this point I had 3500 MB of freespace.
However, when I checked the freespace just after two months of adding additional datafiles, i find that there is only 2000 MB of free space.
No abnormal database activities have been taken up during this period. What could be the reason for such huge drop in freespace..?
regards
thomaskprakash

However, when I checked the freespace just after two months of adding additional datafiles, i find that there is only 2000 MB of free space.
No abnormal database activities have been taken up during this period. What could be the reason for such huge drop in freespace..?There could me many reasons.
First of all, you have checked your freespace after couple of months, did you calculate how much space it would have used in these two months for data and indexes?
Second, your undo and temp might have increased or you may kept them as auto increase mode.
Jaffar

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