Gain insights into diagnostic techniques and anomaly detection with over 200 trace and log analysis patterns, applicable across various software environments, operating systems, and platforms.

General trace and log analysis patterns allow the application of uniform diagnostics and anomaly detection across diverse software environments. It includes troubleshooting, debugging, describing, and explaining problems and incidents on various operating systems and platforms. It is also helpful in recording network traces, malware, general data, narratives, and text and image analysis (space-like narratology). This course, organized as a pattern language dictionary and cross-referenced with classification, explains and teaches more than 200 traces and log analysis patterns.

A Guide to Learning Software Trace and Log Analysis Patterns

# No activity
**No activity** is the limit of the [discontinuity](https://www.educative.io/courses/guide-learning-software-trace-log-analysis-patterns/discontinuity-fiber-flag-glued-last) pattern. The absence of activity can be seen at a thread level or at a process level where it is similar to the [missing component](https://www.educative.io/courses/guide-learning-software-trace-log-analysis-patterns/size-guest-minimal-missing-no-metafile) pattern. The difference from the latter
pattern is that we know for certain that we selected our process modules for tracing but do not see any trace messages. Consider this example:

Only modules from the `AppA` process and modules from a coupled process (for example, `ModuleB`) were selected. However, we only see a reminder message from the coupled process (`3124.4816: _ModuleB!WorkerThread_`) and no messages for 21 seconds. Fortunately,
`AppA` process memory dump was saved during the tracing session:
>Debug session time: Fri May 21 08:04:31.000 2010 (GMT+0)

We see two threads waiting for a critical section:




This lesson introduces the following analysis patterns: no activity, phantom activity, piecewise activity, punctuated activity, and resume activity.

Getting Started

Activity

Block and Data

Error and Large Scale

Message 1

Message 2

Trace as a Whole

Trace Set

Vocabulary, Memory, Code and Text

Conclusion

Index

No, Phantom, Piecewise, Punctuated, Resume

No activity