Regression Job Histogram

The Regression Job Histogram is a visual display of job count frequency based on a variety of job-based fields:

• Runtime
• Cycles
• CPS
• Any Job Metadata:
  • Examples: transactions, peak_memory, disk_usage, latency, etc.

Example Histogram

This is an example histogram for a regression using peak_memory_mb:

• You can see peak_memory_mb ranges from 3GB to 10.5GB, with a median of 4.5GB.
• Also, there are charts of overall Launch/Finish metrics on the right side of the page.

Clickable Histogram Bins

For debugging purposes, Histogram Bins can be clicked, to drilldown into a list of jobs within the bin.

Accessing the Histogram

To access the histogram:

• Go to any Regression Details page.
• Click the Histogram button.

See the Histogram arrow below:

Statistics Table

For the chosen metric, the Statistics Table displays:

• Total jobs
• Min value (with a hyperlink to the job)
• Max value (with a hyperlink to the job)
• Average
• Median
• Range (Max-Min)
• Standard Deviation

Regression Launch Metric Charts

The Regression Launch Charts (on the right side of the Histogram page) enable viewing of jobs launching and finishing across a regression duration.

This enables viewing how many jobs are running in parallel, and how many lagging jobs are running.

See also Gantt Chart.