A database instance (Server) is a set of memory structure and background processes that access a set of database files. The process can be shared by all users. The
Latest Answer : Database instance(server) is the combination of memory structure and background process. It's a way to connect to the oracle database. ...
Latest Answer : The basic memory structures associated with Oracle include: • System Global Area (SGA), which is shared by all server and background processes and holds the following: o Database buffer cache o Redo log buffer o Shared ...
Latest Answer : PGA Program global area Contains Session variables ,Stack space,Cursor status ,Sort Areas ...
Enqueues are another type of locking mechanism used in Oracle. An enqueue is a more sophisticated mechanism which permits several concurrent processes to have varying degree of sharing of "known"
Latest Answer : An enqueue is a sophisticated locking mechanism that permits several concurrent processes to share known resources to varying degrees. Any object that can be used concurrently can be protected with enqueues. For example, Oracle allows varying levels of ...
Latest Answer : Thanks for the information! ...
Latest Answer : It depends on your requirement, if you want no of users around 300 then you can still achieve that by keeping PGA parameters low. If you are looking for number of users 1000 or even more, you need to go for shared server mode. ...
Latest Answer : Part of the SGA contains general information about the state of the database and the instance, which the background processes need to access; this is called the fixed SGA. No user data is stored here. The SGA also includes information communicated between ...
What is Oracle Reserved Memory and Unreserved Memory? What is the size of Oracle Reserved Memory?
Latest Answer : Is the meomory that is allocated to each connection to Oracle, this memory is not recliamed even if the session is inactiveit is recliamed if the session is disconnected onlyto see it:D:appadminproduct11.1.0db11gBINorastack oracle.exe to change it to ...
How do you see how many memory segments are acquired by Oracle Instance.
Latest Answer : Check on x$bh it show you what objects are in the buffer.Try this query;SELECT /*+ ordered use_hash(o) use_hash(bh) */ bp.NAME BUFFER_POOL, u.NAME owner, so.object_type segment_type, ...
How do you see how many memory segments are acquired by Oracle Instance.
Latest Answer : For shared memory segmets in UNIX or LINUX:-->In HOST1_LINUX has one instance $ ipcs -m oracle@HOST1_LINUX:$ ipcs -m------ Shared Memory Segments --------key shmid ...