Small Datum

A long time ago I wrote mstat to collect iostat, vmstat and MySQL (show global status) performance counters. It samples everything at the same interval (every N seconds), computes rates for all numeric values and has some support for expressions so I can define a new counter as a function of other counters. Eventually I stopped using it and then there were problems. Recently I fixed many of them. The tool now works with Python3 and supports old and new iostat output format . This week I started to add support for Postgres and MongoDB. It gets data from pg_stat_bgwriter for Postgres and from db.serverStatus() for MongoDB. So the tool is useful to me again but it won't be useful to others until I add docs. The tool prints one line in CSV format per time interval. The line is likely to be long because there can be hundreds of counters in the line. The name and offset for each counter is printed at startup. I extract data using bash and awk as part of my benchmark workflow. Beca

I am trying to automate some of the tasks that I must do to produce performance reports. By trying I mean that I am just getting started on this and will be making decisions I might regret later. This is also a request for advice, feedback and corrections. Some requirements, not all of which will be satisfied: interactive - I prefer that the format can be hosted in a way that allows for discussions. Google Docs does a great job at this by supporting access control and threaded discussions on comments. graphics - support charts and graphs. Back in the day I was a happy user of Google Image Charts that let me define a chart in a URL. Alas, the service has been turned off and the new thing from Google requires Javascript. self-contained - I want to share the report as one thing . With Google Docs that thing can be the URL for the doc, even when there are additional things, like spreadsheets, linked to it. With HTML the thing is the HTML document. script-able - I want to create as