Performance monitoring / identify problems

Is there a technique to find and identify database performance problems without accessing the database?


Thank you

Well, if you are root on the server, you can connect to the database as SYSDBA using operating system authentication.

Using operating system tools could be potentially useful, but usually in addition to the information in the database, not instead of it. You can see at the level of the operating system, for example, that the machine is constantly using 95% of the available CPU for long periods of time at night so we can conclude that the current processes of charge every night are generally CPU a bottleneck. Short throw material the problem (which may or may not make things better), however, there is no way to know that the problem is that there are a few poor query plans that are causing excessive CPU consumption and no way to fix the problem.

There are a small number of issues of a bad system configuration that you can see in the level of operating system - for example, if you have 4 GB of physical RAM and the database is regularly using 8 GB of RAM and is constantly exchanging. You must Access the database (or at least the settings file) to change the database settings to use less RAM.

Justin

Tags: Database

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