Hi all,
Given a rollback segment with storage as follows :
Initial Extent 5 MB
Next Extent 5 MB
Min Extents 20
Does this mean that every time a transaction uses this rollback segment it
allocates 100 MB ?
Does this mean that if there are two transactions using this rollback
segment, 200 MB is required ?
Thanks,
Alice
2  3726 
No. A transaction will only use as much space as it requires.
The rollback segment tablespace is just like any other tablespace (as
far as storage is concerned). Therefore it will allocate storage in
multiples of database blocks (db_block_size) .
A rollback segment that has 20 extents of 5Mb each has 100Mb available
for use by any number of transactions concurrently.
Matt
"Alice" <al***@reply-to-group.com> wrote in message news:<40******* *@news.tm.net.m y>... Hi all,
Given a rollback segment with storage as follows :
Initial Extent 5 MB
Next Extent 5 MB
Min Extents 20
Does this mean that every time a transaction uses this rollback segment it
allocates 100 MB ?
Does this mean that if there are two transactions using this rollback
segment, 200 MB is required ?
Thanks,
Alice
Thank Matt.
Regards,
Alice
"Matt" <mc***@hotmail. com> wrote in message
news:cf******** *************** ***@posting.goo gle.com... No. A transaction will only use as much space as it requires.
The rollback segment tablespace is just like any other tablespace (as
far as storage is concerned). Therefore it will allocate storage in
multiples of database blocks (db_block_size) .
A rollback segment that has 20 extents of 5Mb each has 100Mb available
for use by any number of transactions concurrently.
Matt
"Alice" <al***@reply-to-group.com> wrote in message
news:<40******* *@news.tm.net.m y>... Hi all,
Given a rollback segment with storage as follows :
Initial Extent 5 MB
Next Extent 5 MB
Min Extents 20
Does this mean that every time a transaction uses this rollback segment
it allocates 100 MB ?
Does this mean that if there are two transactions using this rollback
segment, 200 MB is required ?
Thanks,
Alice
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