Home > Articles > Home & Office Computing > Mac OS X

z/OS® Version 8 DBA Certification Guide: DB2 Environment

Jan 28, 2005

📄 Contents

␡

⎙ Print

< Back Page 8 of 15 Next >

This chapter is from the book 

DB2 for z/OS Version 8 DBA Certification Guide

Learn More Buy

System Parameters

DSNZPARMs

At installation time you supply values for the DB2 DSNZPARM parameters via the install panels. Table 2-1 lists all the DSNZPARMs, along with a description of each, the allowable values, and whether they can be changed online.

Table 2-1. DSNZPARMs

Parameter	Description	Acceptable Values (defaults are in boldface)	Online Updatable
`ABEXP`	`EXPLAIN` processing	YES, NO	Yes
`ABIND`	Autobind	YES, NO	Yes
`ACCUMACC`	DDF/RRSAF accumulated data	NO, 2–65,535 10	Yes
`AGCCSID`	ASCII-coded character set (graphic)	0–65,533	—
`ALCUNIT`	Allocation units	BLK, TRK, CYL	Yes
`ALL/dbname`	Start names	ALL, space names	—
`AMCCSID`	ASCII-coded character set (mixed)	0–65,533	—
`APPENSCH`	Application encoding	ASCII, EBCDIC, Unicode, CCSID	—
`ARCPFX1`	Copy 1 prefix	1–34 characters	Yes
`ARCPFX2`	Copy 2 prefix	1–34 characters	Yes
`ARCRETN`	Retention period	0–9,999	Yes
`ARCWRTC`	WTOR route code	1–16 1,3,4	Yes
`ARCWTOR`	Write to operator	NO, YES	Yes
`ARC2FRST`	Read Copy 2 archive	NO, YES	Yes
`ASCCSID`	ASCII-coded character set (single byte)	0–65,533	—
`ASSIST`	Assistant	YES, NO	No
`AUDITST`	Audit trace	NO, YES, list, *	No
`AUTH`	Use protection	YES, NO	No
`AUTHCACH`	Plan authorization cache	0–4,096 3,072	Yes
`BACKODUR`	Backout duration	0–255 5	No
`BINDNV`	Bind new package	BINDADD, BIND	Yes
`BLKSIZE`	Block size	8,192–28,672 24,576	Yes
`BMPTOUT`	IMS BMP Timeout	1–254 4	Yes
`CACHEDYN`	Cache dynamic SQL	NO, YES	Yes
`CACHEPAC`	Package authorization cache	0–2M 32K	No
`CACHERAC`	Routine authorization cache	0–2M 32K	No
`CATALOG`	Catalog alias	1–8 characters DSNCAT	Yes
`CDSSRDEF`	Current degree	1, ANY	Yes
`CHARSET`	CCSID used	ALPHANUM, KATAKANA (if SCCSID = 930 or 5,026)	—
`CHKFREQ`	Checkpoint frequency	200–16M records (500K), or 1–60 minutes	Yes
`CHGDC`	Drop support	1,2,3	Yes
`CMTSTAT`	DDF threads	ACTIVE, INACTIVE	No
`COMPACT`	Compact data	NO, YES	Yes
`COMPAT`	IBM service	OFF	—
`CONDBAT`	Maximum remote connected	0–25,000 10,000	Yes
`CONTSTOR`	Contract thread storage	NO, YES	Yes
`COORDNTR`	Coordinator	NO, YES	No
`CTHREAD`	Maximum users	1–2,000 200	Yes
`DBACRVW`	DBADM can create view for other authid	YES, NO	Yes
`DBPROTCL`	Database protocol	DRDA, Private	Yes
`DATE`	Date format	ISO, USA, EUR, JIS, LOCAL	—
`DATELEN`	Local date length	0, 10 –254	—
`DDF`	DDF start-up option	NO, AUTO, COMMAND	No
`DEALLCT`	Deallocate period	0–1,439 minutes, 0–59 seconds, NOLIMIT	–Yes
`DECARTH`	Decimal arithmetic	DEC15, DEC31, 15, 31	—
`DECDIV3`	Minimum divide scale	NO, YES	No
`DECIMAL`	Decimal point	, .	—
`DEFLANG`	Language default	ASM, C, CPP, COBOL, COB2, IBMCOB, FORTRAN, PL1	—
`DEFLTID`	Unknown authid	IBMUSER, or authid	No
`DELIM`	String delimiter	DEFAULT, ", '	—
`DESCSTAT`	Describe for static	NO, YES	Yes
`DISABSCL`	SQLWARN1 and 5 for nonscrollable cursors	NO, YES	—
`DLDFREQ`	Level ID update frequency	0–32,767 5	Yes
`DLITOUT`	DL/I batch timeout	1–254 6	Yes
`DSHARE`	Data sharing	YES, NO, blank	No
`DSMAX`	Data set maximum	1–100,000	Yes
`DSQLDELI`	Dist SQL string delimiter	', ''	—
`DSSTIME`	Data set stats time	1–1,440 5	Yes
`DSCVI`	Vary DS control interval	YES, NO	—
`DYNRULES`	Use for dynamic rules	YES, NO	—
`EDMBFIT`	Algorithm for free chain search	YES, NO	Yes
`EDMDBDC`	EDM DBD cache	5,000–2,097,152K	–Yes
`EDMPOOL`	`EDMPOOL` storage size	1K–2,097,152K 32,768	Yes
`EDMSTMTC`	EDM statement cache size	0–1,048,576K 5,000	Yes
`EDPROP`	Drop support	1, 2, 3	Yes
`ENSCHEME`	Default encoding scheme	EBCDIC, ASCII	—
`EVALUNC`	Predicate evaluation with UR and RS	YES, NO	Yes
`EXTRAREQ`	Extra blocks requester	0–100	Yes
`EXTRASRV`	Extra blocks server	0–100	Yes
`EXTSEC`	Extended security	NO, YES	Yes
`GCCSID`	EBCDIC coded character set (graphic byte)	0–65,533	—
`GRPNAME`	Group name	1–8 characters DSNCAT	No
`HOPAUTH`	Authorization at hop site	BOTH, RUNNER	No
`IDBACK`	Maximum batch connect	1–2,000 50	Yes
`IDFORE`	Maximum TSO connect	1–2,000 50	Yes
`IDTHTOIN`	Idle thread timeout	0–9,999 120	Yes
`IDXBPOOL`	Default buffer pool for user indexes	BP0–BPx	Yes
`IMMEDWRI`	Immediate write	NO, YES, PH1	Yes
`IRLMAUT`	Autostart	YES, NO	No
`IRLMPRC`	Procedure name	IRLMPROC, IRLM proc name	No
`IRLMRWT`	Resource timeout	1–3,600 60	No
`IRLMSID`	Subsystem name	IRLM, IRLM name	No
`IRLMSWT`	Time to autostart	1–3,600	Yes
`IXQTY`	Index space default size	0–4,194,304	–Yes
`LBACKOUT`	Postpone backward log processing	AUTO, YES, NO	No
`LC_CTYPE`	Locale `LC_CTYPE`	Valid locale 0–50 characters	—
`LEMAX`	Maximum LE Tokens	0–50, 20	No
`LOBVALA`	User LOB value storage	1–2,097,152 10,240	Yes
`LOBVALS`	User LOB value storage	1–510,002 2,048	Yes
`LOGAPSTG`	Log apply storage	1–100M 100	No
`LRDRTHLD`	Long-running reader threshhold	0–1,439 minutes	–Yes
`MAINTYPE`	Current maintenance types for MQTs	NONE, SYSTEM, USER, ALL	Yes
`MAXARCH`	Recording maximum	10–1,000	No
`MAXDBAT`	Maximum remote active	0–1,999 200	Yes
`MAX_NUM_CUR`	Maximum open cursors	0–99,999 500	Yes
`MAXKEEPD`	Maximum kept dynamic statements	0–65,535 5000	Yes
`MAXRBLK`	RID pool size	0, 16K–1,000,000K calculated	Yes
`MAXRTU`	Read tape units	1–99 2	Yes
`MAX_ST_PROC`	Maximum number of stored procedures	0–99,999 2,000	Yes
`MAXTYPE1`	Maximum Type 1 inactive	0–MAX REMOTE CON	–Yes
`MCCSID`	EBCDIC coded character set (mixed byte)	0–65,533	—
`MEMBNAME`	Member name	1–8 characters DSN1	No
`MGEXTSZ`	Optimize extent sizing	YES, NO	Yes
`MINDVSCL`	Minimum scale for decimal division	NONE, 3, 6	—
`MINRBLK`	Number of RID lists for each RID map	1, n	—
`MINSTOR`	Thread management	YES, NO	Yes
`MIXED`	Mixed data	NO, YES	—
`MON`	Monitor trace	NO, YES	No
`MONSIZE`	Monitor size	8K to 1M	No
`NPGTHRSH`	Use of index after table growth	0, –1, n	Yes
`NUMLKTS`	Locks per table space	0–50,000 1,000	Yes
`NUMLKUS`	Locks per user	0–100,000 10,000	Yes
`OFFLOAD`	Offload active logs online	NO, YES	—
`OJPERFEH`	Disable outer join performance enhancements		Yes
`OPTPREF`		ON, OFF	—
`OPTHINTS`	Optimization hints	NO, YES	Yes
`OUTBUFF`	Output buffer	40K–400MB 400K	No
`PADIX`	Pad index by default	YES, NO	Yes
`PADNTSTR`	Pad null-terminated strings	YES, NO	Yes
`PARAMDEG`	Degree of parallelism	0–no upper limit	–Yes
`PARTKEYU`	Allow partitioning keys to be updated	YES, NO, or same	Yes
`PCLOSEN`	Read-only switch checkpoints	1–32,767 5	Yes
`PCLOSET`	Read-only switch time	1–32,767 10	Yes
`POOLINAC`	Pool thread timeout	0–9,999 120	Yes
`PRIQTY`	Primary quantity	Blank, 1–9,999,999	Yes
`PROTECT`	Archive logs protected with RACF	NO, YES	Yes
`PTASKROL`	Include accounting traces for parallel tasks	YES, NO	Yes
`QUIESCE`	Quiesce period	0–999 5	Yes
`RECALL`	Recall database	YES, NO	No
`RECALLD`	Recall delay	0–32,767 120	Yes
`REFSHAGE`	Current refresh age	0, ANY	Yes
`RELCURHL`	Release locks	YES, NO	Yes
`RESTART/DEFR`	Restart or defer	RESTART, DEFER	—
`RESYNC`	Resync interval	1, 2 –99	Yes
`RETLWAIT`	Retained lock timeout	0–254	–Yes
`RETVLCFK`	Varchar from index	NO, YES	Yes
`RGFCOLID`	Registration owner	1–8 characters DSNRGCOL	No
`RGFDBNAM`	Registration database	1–8 characters DSNRGFDB	No
`RGFDEDPL`	Control all applications	NO, YES	No
`RGFDEFLT`	Unregistered DDL default	APPL, ACCEPT, REJECT	No
`RGFESCP`	ART/ORT escape character	Nonalphanumeric character	No
`RGFFULLQ`	Require full names	YES, NO	No
`RGFINSTL`	Install DD control support	NO, YES	No
`RGFNMORT`	OBJT registration table	1–17 characters `DSN_REGISTER_OBJT`	No
`RGFNMPRT`	APPL registration table	1–17 characters `DSN_REGISTER_APPL`	No
`RLF`	RLF autostart	NO, YES	No
`RLFAUTH`	Resource Authid	SYSIBM, or authid	Yes
`RLFERR`	RLST access error	NOLIMIT, NORUN,1–50,000,000	Yes
`RLFERRD`	RLST access error	NOLIMIT, NORUN,1–50,000,000	Yes
`RLFTBL`	RLST name suffix	01, 2 alphanumeric characters	Yes
`ROUTCDE`	WTO route codes	1, 1–14 route codes	No
`RRULOCK`	U lock for RR/RS	NO, YES	Yes
`SCCSID`	EBCDIC coded character set (single byte)	0–65,533	—
`SECQTY`	Secondary quantity	Blank, CLIST calculated, 1–9,999,999	Yes
`SECLCACH`
`SEQCACH`	Sequential cache	BYPASS, SEQ	Yes
`SEQPRES`	Utility cache option	NO, YES	Yes
`SITETYP`	Site type	LOCALSITE, RECOVERYSITE	No
`SJMXPOOL`	Star join maximum pool	0–1,024 20	Yes
`SJTABLES`	Number of tables in star join		Yes
`SMFACCT`	SMF accounting	NO, YES(1), list (1–5,7,8), *	No
`SMFSTAT`	SMF statistics	YES (1,3,4), NO, list(1–5) , *	No
`SMSDCFL`	SMS data class for file table space	Blank, 1–8 characters	Yes
`SMSDCIX`	SMS data class for index table space	Blank, 1–8 characters	Yes
`SPRMEDX`			Yes
`SPRMLTD`	Size threshhold for compression	10	—
`SQLDELI`	SQL string delimiter	Default, ', "	—
`SRTPOOL`	Sort pool size	240K–64,000K	Yes
`SSID`	Subsystem name	DSN, SSID	—
`STARJOIN`	Enabling star join	Disable, enable, 1, 2–32,768	Yes
`STATHIST`	Collect historical statistics	SPACE, NONE, ALL, ACCESSPATH	Yes
`STATSINT`	Time to write RTS stats	1–1,440 minutes 30	Yes
`STATROLL`	Run stats aggregates partition-level statistics	YES, NO	Yes
`STATIME`	Statistics time	1–1,440 minutes 30	Yes
`STDSQL`	Standard SQL language	NO, YES	—
`STORMXAB`	Maximum abend count	0–225	–Yes
`STORPROC`	DB2 procedure name	1–8 characters ssnmSPAS	No
`STORTIME`	Timeout value	5–1,800 seconds 180	Yes
`SUPERRS`	Suppress logrec recording during soft errors	YES, NO	Yes
`SVOLARC`	Single volume	YES, NO	Yes
`SYNCVAL`	Statistics sync	NO, 0–59	Yes
`SYSADM`	System administrator 1	SYSADM or authid	Yes
`SYSADM2`	System administrator 2	SYSADM or authid	Yes
`SYSOPR1`	System operator 1	SYSOPR or authid	Yes
`SYSOPR2`	System operator 2	SYSOPR or authid	Yes
`TBSBPOOL`	Default buffer pool for user data	BP0 – BPx	Yes
`TCPALVER`	TCP/IP already verified	NO, YES	Yes
`TCPKPALV`	TCP/IP keep alive	ENABLE, DISABLE, 1–65,524 120	Yes
`TIME`	Time format	ISO, JIS, USA, EUR, LOCAL	—
`TIMELEN`	Local time length	0, 8–254	—
`TRACLOC`	Size of local trace table	16 (4K bytes)
`TRACSTR`	Trace autostart	NO, YES (1–3), list (1–9)	No
`TRACTBL`	Trace size	4–396K 64K	No
`TRKRSITE`	Remote tracker site usage	NO, YES	No
`TSQTY`	Define allocation for table space	0–4,194,304	–Yes
`TSTAMP`	Timestamp archives	NO, YES	Yes
`TWOACTV`	Number of active copies	2, 1	No
`TWOARCH`	Number of archive copies	2, 1	No
`TWOBSDS`	Number of BSDSs	YES, NO	—
`UGCCSID`	Unicode CCSID (graphic)	1,208	—
`UIFCIDS`	Unicode IFCIDS	YES, NO	Yes
`UMCCSID`	Unicode CCSID (mixed)	1,208	—
`UNIT`	Device Type 1	TAPE or any device	Yes
`UNIT2`	Device Type 2	Device or unit name	Yes
`URCHKTH`	UR check frequency	0–255	Yes
`URLGWTH`	UR log write check	0–1,000K	Yes
`USCCSID`	Unicode CCSID (single byte)	1,208	—
`UTIMOUT`	Utility timeout	1–254	Yes
`VOLTDEVT`	Temporary unit name	SYSDA, valid name	Yes
`WLMENV`	WLM environment	Valid name, 1–18 characters	Yes
`XLKUPDT`	X Lock for searched U/D	YES, NO	Yes

After installation, these DSNZPARMs can be changed without your having to go back through the installation process. You can do this by changing the DSNTIJUZ member and reassembling and bouncing the DB2 subsystem, or performing an online change, for them to take effect.

Online DSNZPARMs

DB2 also allows for about 123 of the most popular DSNZPARMs to be dynamically changed without your having to stop and restart the DB2 subsystem and thereby cause an unwanted outage. The advantage to changing DSNZPARMs dynamically is to be able to tailor parameters to the current workload. For example, an approved change to the Environmental Descriptor Manager pool size can be implemented sooner without a DB2 outage. It may also be desirable to change not only buffer pool size but also EDM pool size and checkpoint frequency for overnight batch processing.

The DSNZPARM member is changed dynamically in its entirety by activating a different DSNZPARM member. The –SET SYSPARM command is used from a z/OS console, a DSN session under TSO, a DB2I panel, a CICS or IMS terminal or via an application or product using the Instrumentation Facility. The issuer must have SYSADM, SYSCTRL, or SYSOPR authority; for more on these authorities, refer to Chapter 3. The following forms of the SET SYSPARM statement can be used for controlling dynamic DSNZPARM settings:

-SET SYSPARM LOAD (modname)
Loads the named parameter module
Default is DSNZPARM

-SET SYSPARM RELOAD
Last named subsystem parameter module is loaded into storage

-SET SYSPARM STARTUP
Loads the initial parameters from DB2 startup

< Back Page 8 of 15 Next >

🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Privacy Notice

Overview

Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security

Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children

This site is not directed to children under the age of 13.

Marketing

Pearson may send or direct marketing communications to users, provided that

Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
Such marketing is consistent with applicable law and Pearson's legal obligations.
Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out

Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

As required by law.
With the consent of the individual (or their parent, if the individual is a minor)
In response to a subpoena, court order or legal process, to the extent permitted or required by law
To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
To investigate or address actual or suspected fraud or other illegal activities
To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links

This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020

Email Address