Screenshots: various patterns

Again, some more charts of database usage. It shows some other types of the regular line graphs, and some other metrics than wait/io and queries.

Example 1

Above are the cpu and wait metrics shown, but in a bar graph. The first one shows the complete time frame, in the second one only the data of the office hours are shown.

Example 2

Chart shows trouble; enqueue waits in an OLTP system used by 50 to 100 users. Yes, the numbers on the y-axis are seconds ! So this means 12000+ seconds of production loss in one hour. Massive blocking locks, and a few deadlocks now and then.

Example 3

This shows a lot of graphs of the same database of the same time span. Graphs show trouble.

Yes, again, y-axis shows seconds ! Massive ‘buffer busy waits’ and ‘latch: cache buffer chains’.

Abnormal ‘db file sequential read’ peaks correspondent with the peaks found in ‘buffer busy waits’ and ‘latch: cache buffer chains’.

Very high activity on temp-files. Graph shows ‘reads per second’ and ‘writes per second’ averaged over one hour.

What is Oracle doing with it’s sga_target in the meantime ?


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: