What is an Oracle process?
Oracle processes run the Oracle database code. Background processes start with the database instance and perform maintenance tasks such as performing instance recovery, cleaning up processes, writing redo buffers to disk, and so on. Server processes perform work based on a client request.
What is Pmon process?
The process monitor (PMON) performs process recovery when a user process fails. PMON is responsible for cleaning up the database buffer cache and freeing resources that the user process was using. PMON also registers information about the instance and dispatcher processes with the network listener.
What is the purpose of the Ckpt process?
CKPT (Oracle Checkpoint Process) is an Oracle background process that timestamps all datafiles and control files to indicate that a checkpoint has occurred.
What are the mandatory background processes?
This section describes the following mandatory background processes: Process Monitor Process (PMON) System Monitor Process (SMON) Database Writer Process (DBWn)
What is user and server process in Oracle?
Background processes are involved in running the Oracle software itself. Server processes negotiate the actions of the users. User processes commonly work outside the database server itself to run the application that accesses the database.
What are database processes?
Data processing refers to the process of performing specific operations on a set of data or a database. A database is an organized collection of facts and information, such as records on employees, inventory, customers, and potential customers.
What is Ckpt process in Oracle?
The CKPT process, which always exists in Oracle8 but is optional in Oracle7, is responsible for updating the headers of all Oracle datafiles at the time of a checkpoint. In Oracle7, this task may be performed by the LGWR process, but if there are many datafiles in the database then LGWR performance may be reduced.
When a checkpoint occurs the Ckpt process?
Checkpoint Process (CKPT) When a checkpoint occurs, Oracle must update the headers of all datafiles to record the details of the checkpoint. This is done by the CKPT process. The CKPT process does not write blocks to disk; DBWn always performs that work.
What is the purpose of Smon background process?
SMON is the System Monitor which is responsible for recovering the system after a failure. It performs all system monitoring functions on the oracle database.
Which of the background processes is optional?
Some are mandatory and some are optional. Mandatory background processes are DBWn, LGWR, CKPT, SMON, PMON, and RECO. All other processes are optional, will be invoked if that particular feature is activated. Background processes are started automatically when the instance is started.
What is difference between user process and server process?
Server processes negotiate the actions of the users. User processes commonly work outside the database server itself to run the application that accesses the database.
What are the steps in the communication process?
The sender develops an idea to be sent The beginning of the communication process involves the sender creating an idea that they plan to send to another person or group of people. Essentially, they’re planning the overall subject matter or information they want to transmit. 2. The sender encodes the message
Who is the sender in the communication process?
Sender: This is the person that is delivering a message to a recipient. Message: This refers to the information that the sender is relaying to the receiver. Channel of communication: This is the transmission or method of delivering the message. Decoding: This is the interpretation of the message.
What does feedback mean in the communication process?
It refers to the response of the receiver as to the message sent to him/her by the sender. Feedback is necessary to ensure that the message has been effectively encoded, sent, decoded and comprehended. It is the final step of the communication process and establishes that the receiver has received the message in its letter and spirit.
How is the process of communication a cyclic one?
The process of communication is a cyclic one as it begins with the sender and ends with the sender in the form of feedback. It takes place upward, downward and laterally throughout the organization. The process of communication as such must be a continuous and dynamic interaction, both affecting and being affected by many variables.