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16 Storage Management with DB2 for OS/390
Work database table spaces. When required, 8K and 16K pages are placed in a
32K table space of the Work database.
Figure 4 on page 16 shows how the size and number of table spaces in the Work
database is defined. Parameters 13 through 16 on this figure show the default
number of table spaces (one for each page size), and default sizes for the 4K
table space (16 MB) and the 32K table space (4 MB).
Figure 4. Installation Panel for Sizing DB2 System Objects
3.4.3 SYSIBM.SYSCOPY
This table is a DB2 Catalog table. It is referred to by its short name: SYSCOPY.
The table space in which SYSCOPY is stored is called: DSNDB06.SYSCOPY.
SYSCOPY contains recovery related information for each table space. Its main
purpose is to manage image copies, but other related recovery information is
also recorded here. For example, SYSCOPY contains information of:
• Image copies
• Quiesce points
• LOAD executions
• REORG executions
• RECOVER executions
3.4.4 SYSIBM.SYSLGRNX
This table is a DB2 Directory table. It is referred to by its short name:
SYSLGRNX. The table space in which SYSLGRNX is stored is called:
DSNDB01.SYSLGRNX.
SYSLGRNX stores records that serve to improve recovery performance by
limiting the scan of the log to changes that must be applied. The SYSLGRNX
records contain the first log RBA (or LRSN in a data sharing group) and the last
DSNTIPD INSTALL DB2 - SIZES
===>
Check numbers and reenter to change:
1 DATABASES ===> 200 In this subsystem
2 TABLES ===> 10 Per database (average)
3 COLUMNS ===> 10 Per table (average)
4 VIEWS ===> 3 Per table (average)
5 TABLE SPACES ===> 10 Per database (average)
6 PLANS ===> 200 In this subsystem
7 PLAN STATEMENTS ===> 30 SQL statements per plan (average)
8 PACKAGES ===> 300 In this subsystem
9 PACKAGE STATEMENTS ===> 10 SQL statements per package (average)
10 PACKAGE LISTS ===> 2 Package lists per plan (average)
11 EXECUTED STMTS ===> 15 SQL statements executed (average)
12 TABLES IN STMT ===> 2 Tables per SQL statement (average)
13 TEMP 4K SPACE ===> 16 Amount of 4K-page work space (megabytes)
14 TEMP 4K DATA SETS ===> 1 Number of data sets for 4K data
15 TEMP 32K SPACE ===> 4 Amount of 32K-page work space(megabytes)
16 TEMP 32K DATA SETS ===> 1 Number of data sets for 32K data
F1=HELP F2=SPLIT F3=END F4=RETURN F5=RFIND F6=RCHANGE
F7=UP F8=DOWN F9=SWAP F10=LEFT F11=RIGHT F12=RETRIEVE