How to calculate db2 table size?
SELECT * FROM SYScat. tables where tabname=’mytable’; will tell you how many pages a table is using. Then at the command line: LiST TABLESPACES SHOW DETAIL will tell you how many total pages are in the tablespace and the size of a page in bytes.
How to find database size in gb in db2?
The database size is calculated as follows: dbsize = sum (used_pages * page_size) for each table space (SMS & DMS). An output parameter of type BIGINT that returns the database capacity (in bytes).
What is npages in db2?
NPAGES is the number of pages of an existing table holding data within the database. This number is a proper indicator only when you have updated statistics recently.
How do you check which tablespace a table belongs to in DB2?
Finding container information for DB2 UDB
- Connect to the database PROD as the instance owner.
- Enter the following query to display all the tablespaces in the table TABLE01.
- After locating the tablespace name, enter the following command to find the container path name: $db2 list tablespaces.
What is LRG file in DB2?
Answer: The LRG file is large tablespace container. To decrease the size of file : delete the data in the table , commit an offline REORG using the LONGLOBDATA option. An Inplace REORG will not work.
How many Bufferpools are there in DB2?
IBM® Security Directory Server uses two buffer pools, one for the USERSPACE1 table space and the other for the LDAPSPACE table space.
What is BSDS in DB2?
The bootstrap data set ( BSDS ) is a VSAM key-sequenced data set (KSDS). This KSDS contains information that is critical to Db2, such as the names of the logs. Db2 uses information in the BSDS for system restarts and for any activity that requires reading the log.
How do I view tables in tablespace?
To get the tablespace for a particular Oracle table: SQL> select tablespace_name from all_tables where owner = ‘USR00’ and table_name = ‘Z303’; To get the tablespaces for all Oracle tables in a particular library: SQL> select table_name, tablespace_name from all_tables where owner = ‘USR00’;
What is Db2 LUW?
Db2 (Formerly Db2 for LUW) is a relational database that delivers advanced data management and analytics capabilities for transactional workloads.
What does the Db2 precompiler do?
The Db2 precompiler scans a program and copies all of the SQL statements and host variable information into a DBRM (database request module). The precompiler also returns source code that has been modified so that the SQL statements do not cause errors when you compile the program.
How does the SELECT statement work in Db2 LUW?
Now let’s see how the select statement works in DB2 luw as follows. The select-statement is the type of query that can be straightforwardly determined in a DECLARE CURSOR statement or arranged and afterward referred to in a DECLARE CURSOR statement.
What is a DB2 database?
Basically, DB2 is a family of database management systems, in which we manage the database operation as well as store the data in huge amounts as per the user requirement.
What is the-Z Command in DB2?
If -z filename is set in DB2OPTIONS, the user can set the +z (or -z- ) option from the command line to prevent output data for a particular command invocation from being written to the file. The save all output to file option does not affect any other command line processor option.
What is the use of DB2 terminate command?
If the next command you run is db2 terminate or the last statement in filename is terminate , then the special registers are not reset. This is useful for monitoring which batch job is currently running and differentiating the CLP workload.