For more information, see this announcement: You will see how much of the total each consumes and what applications and users are responsible for such memory consuming work. As an example, to analyze the most active sessions, issue the following command: DB2, especially with the Data Partitioning Feature DPF , takes advantage of parallelism, not only in running large numbers of SQL statements simultaneously, but also to execute efficiently the individual statements themselves. When your DB2 database is configured for HADR, db2top has some additional monitoring functionality specifically designed for such a configuration. Memory Part 2 In the first post on the db2top Memory screen, we examined the gauges and table that are visible at all screen sizes. 
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For those of you who use or like db2top, the new dsmtop tool is worth trying out!
just DB2 chatter: db2top on windows - quick tip
Running db2top in collection mode for a long period for example, 4 hours:. Everything was reordered, hash values seemed to completely change, and the values in the Num Execution column shot upward. Once you have entered db2top successfully, it will look something like this: The db2top Agent screen gives you insight into this process, allowing you to see the state of each subagent and subsection as a statement is executed and helping you identify the source of performance problems such as the occurrence of a sort or hash join overflow.
If an SQL statement starts and finishes between an interval, it will not be included.
Specifies that statements that are currently executing or most recent statements from current sessions are captured at each reporting interval specified by the winvows parameter. Only supported in background mode -b parameter. It is now available as an open beta for your comments and insights! In most cases, using more than one buffer pool on your system can have performance advantages.
db2top – DB2 monitoring command tool
To include locks information in the collection file, use -x along with -C. Database Part 2 In the first post of this series on the db2top Database screen, we took a look at the gauges that make up the top part of the screen and saw the additional data about backups that becomes available when the screen widened to columns or wider.
Videos How to change column order and preserve it in the next session A video to demonstrate how to change the column order and keep it changed for the next time you launch db2top. Running db2top in replay mode, jumping to the desired point in time to analyze further:. Today we will look at the HADR screen in db2top. Tables Part 2 In the first post about the Tables screen, we examined the data that is available on small screens between 80 and columns wide.
Quickly identifies global problems, or specific database partition problems in the system. If a SQL statement starts and finishes between an interval, it will not be caught. In this second part, you will see what db2top reports for individual buffer pools.
As new articles are written describing more sindows of the product, such as the sorting, filtering, and column customization features, links to these articles will be added to this page.
We also saw that we could measure the skew of memory pool usage among partitions in systems that use the Data Partitioning Feature. The delay time cannot be less than one second.
db2top - DB2 monitoring tool command - IBM DB2 for Linux, UNIX, and Windows
Thanks for your time. You will see ways to gauge the efficiency of your caching by looking at individual hit ratios, check your storage space usage, and identify data skew problems in systems that use the Data Partitioning Feature DPF. The links below will take you to descriptions of each of the command line arguments and each of the data reporting screens in db2top. It would be inconvenient to configure it to your liking only to lose your configuration windowws you shut down the tool, so an option is available for saving your configuration to widnows file.
Among other things, these higher level aggregates can help you identify problems of low sort heap allocation at the application level d2top heavy sort heap usage at the individual statement level.
Skip to content The windowa tool is a monitoring tool that comes packaged with every copy of DB2 for Linux and Unix as of version 9. Authorization One of the following: Run db2top in snapshot data collector mode Data Screens Database Part 1 The first major screen of db2top that we will examine is the Database screen.
The -b parameter takes one of the following sub-option values: We will examine how db2top lets you track database-wide hit ratios for your buffer pools, even separating them out into data, index, and temp hit ratios, and see whether your buffer pools are performing mostly reads versus writes or mostly data accesses versus index accesses or temp accesses. Monitoring with db2top in interactive mode commands.
SS skips entries until the specified point in time. Command Line Arguments -d: My favorite way to look at lock chaining issues is using db2top — it is so much quicker to see this way. Fortunately, db2top lets you quickly base the order in which the data is presented on the criteria of your choice.
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