db2 locks

Original address:Http://hi.baidu.com/wader2006/blog/item/78406b60b51f8b47ebf8f8f0.htmlDB2 Common Command Set----DB2 maintenance 2007-09-09 10:10 in the DB2 development process, the whole development process also has a very important part of the work is the maintenance of the database, for the maintenance of a huge information system is very necessary; Leave a simple maintenance manual for a rainy night. Som

The DB2 lock mechanism plays an important role in the DB2 database. Let's take a look at what the DB2 lock mechanism is. In relational databases DB2, Oracle, Sybase, Informix, and SQL Server, the minimal recovery and transaction unit is a transaction Transactions. Transactions are characterized by ACID (atomicity, cons

The DB2 tutorial you are looking at is: DB2 Optimization (simple edition). Prepare-monitors on DB2 "Update monitor switches using Lock on sort on bufferpool on UOW on Table ON statement on " Turn on the monitor switch to get the required performance information The simplest and most effective-bufferpool A buffer pool is a storage area in memory that is used to te

We all know that the DB2 V9.7 database has introduced a series of new features. The emergence of these new features makes IT easier for customers to save IT costs. Specific features include compression enhancement, pureXML enhancement, usability enhancement, monitoring enhancement, and workload management enhancement. Improves security, performance, application development, SQL pl language support, SQL compatibility, high availability, backup, log, el

"Progressive DB2.DBA system Management, operation and application Case" (New) Reading notes 3Variables affecting the DB2 environmentBefore we had successfully installed the DB2 V9.7 Enterprise Edition with the wizard installed on the Windows platform, now we are not in a hurry to make specific DB2 operations such as cr

The following articles mainly introduce you to the basic DB2 commands and related knowledge that you must master as a beginner in DB2 database learning. We all know that you are in the DB2 database getting started course, some friends mentioned this question, and experts answered it and compiled it to help other friends learn and master it. Common

cannot be deleted, try to disconnect the activated connection or restart db2) List system tables: db2 list tables for systemList all user tables: db2 list tablesList all tables: db2 list tables for allList specific user tables: db2 list tables for

performance. Therefore, increase the value of the LOCKLIST parameter as much as possible. It must be noted that the LOCKLIST parameter is not the number of locks, A memory area is a database page (each lock requires 96 bytes in a 32-bit system, and each lock requires 48 bytes for locking. In a 64-bit system, each lock requires 128 bytes. For locking and locking, each lock requires 64 bytes ). The MAXLOCKS parameter corresponds to the LOCKLIST paramet

This part is simple and clear at a glance. Five different permission levels: sysadm, sysctrl, sysmaint, dbadm, and loadBut I have read that there is sysmon in CFG, which may be mentioned later (to obtain access to database system monitor data)Or the version is not updated. The following aspects of the DB2 authorization control database security plan:* Permission level granted to a user* Commands that can be run by users* Allows users to read and/or m

-related parametersThe DB2 parameter configuration is divided into two levels, one at the instance level and the other at the database level. The parameters that affect the data service performance are mainly configured at the database level. Here are three of the more important memory configuration parameters:BufferpagelocklistsortheapBufferpage: Shared by all objects in the same database.Sortheap: Used for sorting the memory swap area, non-shared, s

Label:DB2 default need to switch to db2inst1 this default user to perform the action [Email protected] instance]# Su-db2inst1 [Email protected] ~]$ Db2start [Email protected] ~]$ DB2 force application All [Email protected] ~]$ Db2stop [Email protected] db2]$ db2stop force Show All instances[Email protected] ~]$ db2ilist Displays the current instance[[Email protected] ~]$

Document directory The first half of this article: connecting to a remote DB2 database using command lines The second part of this article: Use coolsql to connect to the DB2 database configuration Diagram The first half of this article: connecting to a remote DB2 database using command lines. The second half of this article: connecting to a

DB2 databaseIt provides high-level data availability, integrity, security, recoverability, and small-to large-scale execution capabilities. Its performance is very powerful, the simplest and most effective Bufferpool A buffer pool is a storage area in the memory. It is used to temporarily read and modify database pages (including table rows or index items ). The buffer pool is used to improve the performance of the database system. Accessing data from

What we will introduce to you today is the correct use of the DB2 dart tool to understand the DB2 data storage method, the following is a detailed description of the main content of the article on how to use the DB2 dart tool to understand the DB2 data storage method. I hope you will have a better understanding of it a

Fortunately, DB2 provides the related USEREXIT Program (also known as the user exit Program), which allows us to manage log files and has the possibility of extended functions. At this point, DB2 is obviously better than Orac. Fortunately, DB2 provides the related USEREXIT Program (also known as the user exit Program), which allows us to manage log files and has

The following article describes how to create a second DB2 instance in the command line status in the DB2 database under the linux operating system, the following describes the actual operation steps for creating a DB2 instance. We hope this will help you in your future study. In DB2 in linux, create the second

DB2 has three main security mechanisms to help DBAs implement database security plans: Authentication, authorization, and privilege ). Five different permission levels: sysadm, sysctrl, sysmaint, dbadm, and load A new concept in DB2 9 is tag-based access control (lbac) that allows control of who has the right to access individual rows and/or columns. Install sample DBDb2cmdDb2sampleCreating Database "sampl

Create a federated database for DB2 UDB and Informix IDS using DB2 II Cisco and Huawei network technology-the largest network content Teaching Resource Network (vlan9.com) Http://www.qqread.com Author: Source: blog.chinaunix.net browse: 45 DB2 II is now called WebSphere II Environmen

Today I saw a group of friends asked two questions comparison basis:1 How to confirm my DB2 is the root What about the installation? In fact, from DB2 UDB V9.1 have db2ls This command, the problem is much simpler, we just need to simply run down the db2ls, and then see the output of the Installer UID is 0(Root uid), as shown in:[[email protected] ~]$ db2lsinstall Path level Fix Pack Special install number i

to manually specify when to update the MQT, instead of making the update happen automatically. For example 1, it is likely to be updated immediately after all the tasks updated each night are completed.For example 2, The MQT is usually updated every day. Therefore, even if the underlying data is updated cyclically, all queries accessing the MQT return the same results throughout the day.DB2 partitioning features play a role The DB2 partition feature