There has been a debate ever since the creation of both temp tables and table variables - which of them should be used in a given situation? Ever since their introduction, the key to finding an answer has been the same - knowing the specifics in the instance and correlating them with what each of these two offers.
It is quite common knowledge among DBAs that temp tables are likely to cause recompilation. It occurs due to the treatment they get from the SQL Server Engine, which is similar to that of regular…
Correcting slow queries is not as complicated when it is altered slightly. A basic example of such changing can be demonstrated in an OR or IN query, where several values are compared using a WHERE cl...
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The SQL
Server database engine can benefit a lot from indexes in terms of performance
for a range of various queries. At times, such performance boosts are
significant. A crucial characteristic of ...
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Every Oracle database admin wants its users to attain the best and hassle-free server database performance. But when that doesn't happen, it's a nightmare.
In today’s article, we continue to discuss some more thumb rules that are generally applicable in SQL development. These guidelines remain the same, no matter what the underlying DBMS is. Here, we…
A database app needs regular communication between different and diverse computing resources to work productively and as per requirements. Practically, performance tuning in SQL Oracle or any other database application can be divided into 3 sections - System modificationsDatabase tuningApplication tuning These are all connected, and database performance handling needs a structured strategy throughout these…
In this blog, we'll cover redundant and duplicate indexes, which are quite common in applications and affect database performance.
In this blog, we’ll cover redundant and duplicate indexes, which are quite common in applications and affect database performance. An index is duplicated when there is more than one defined on a single column. Such indexes may have varying names or keywords used to define them at times. A common ins…
So, you were convinced your database has been working efficiently. But one fine day (or late at night), you find your CPU usage surged and reached a hundred percent, leaving you scrambling to find ways to fix it.
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Every time a database administrator takes a look at an MK-query-digest report, they generally observe the queries causing the greatest effect. In other words, they look at the total execution time…
Also, one
needs to be careful while updating the cache as several data manipulations
could be taking place simultaneously. Another thing to keep in mind in such
cases is the rise in latency when it comes to constructing cache expired items.
This is especially true during optimization of SQL queries when they could just as easily been recovered in the
background.
As time passes, human resources are rapidly getting replaced by computing resources, affecting the task range of an Oracle DBA. You may have observed the consolidation of Oracle instances onto a bigger server with a greater number of CPUs. Due to this, fewer DBA professionals are needed by organizations.
The process
of optimization in SQL might seem complex to a lot of us, especially when we
consider the operation of centralized systems. After gaining all the
alternative access paths to compute a r...
Performance becomes a major issue in nearly every real-time
production environment. Unlike configuration-related problems or bugs in
Oracle, performance issues stem from poorly-designed statements or ill-suited
execution plans. That’s why DBAs often end up looking for an Oracle query
optimizer tool to improve database speed.
Security is a crucial factor when it comes to databases. Improving it involves access control and in that regard, the database engines of each SQL Server performance edition only allow it from the main computer. This remains true at least until the initial installation but what if you have to access…
