Moving big data to the cloud has many advantages. The cloud enables you to run business intelligence in extra-large datasets, getting valuable insights. You can also make the data available for collaboration or store it to ensure availability in case of failure or disaster..
In this tables, I relate general terminology, versions, utilities and views from IBM DB2 and Oracle databases..
This mini tip show you how to know when was the last time you restart a DB2 server on a UNIX / LINUX.
> db2 get snapshot for dbm | grep Start Start Database Manager timestamp = 04/02/2011 13:45:20.516473
Simple, isn't it?
It’s relatively simple and unfamiliar tool for the novices: db2top.
Using the option “T” (tables) and sorting the list (key “z”) using column 1.
The first position will be for the most accessed table.
If there is much difference between that and the rest during an appreciable period of normal use of the database, these tables would be candidates to improve their access or optimice their access to improve the overall performance,
The cache hit ratio is one of the indicators used for tuning tasks. It Measures the percentage of hits in memory, specifically in the bufferpools (each of them).
To get the cache hit ratio for each buffer pool configured to run this query:
SELECT SUBSTR(DB_NAME,1,8) AS DB_NAME, SUBSTR(BP_NAME,1,14) AS BP_NAME,
TOTAL_HIT_RATIO_PERCENT, DATA_HIT_RATIO_PERCENT,
INDEX_HIT_RATIO_PERCENT
FROM SYSIBMADM.BP_HITRATIO ORDER BY DBPARTITIONNUM
Migrating to the cloud is becoming increasingly popular, and for good reason. Cloud migration can provide boosts in performance and accessibility at a fraction of the price of what most businesses can achieve on their own..
Below are a list with the more common status of IBM DB2 tablespaces
The most used method to show the status of the tablespaces is, from the console command line:
Many are claiming that containerization is the future of the cloud and maybe even of application development in general. Supporting this is the fact that Google alone launches more than two billion containers each week. In fact, almost all of the Google services you know and use are built on containers..
Db2look is an utility to extract the definition of database objects. It also allows some really interesting statistics to extract objects for export to other test environments / integration plans and get the same access to objects.
In this article we will see more frequent usefulness.
DDL extraction of the objects in my schema:
db2look -d MI_BBDD -a -e -x -o FICHERO_SALIDA.txt
Extraction of the DDL of the DEPT table:
db2look -d MI_BBDD -t DEPT -a -e -x -o FICHERO_SALIDA.txt
To include statistics to have to use the “-m” option.
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