John Ackermann N8UR wrote: > One problem is that if you keep lots of days worth of logs and create a > long-term plot from it, the program can take a long time to run. It > doesn't keep a lot of data in memory, so it's looping through maybe 100 > MB of log data. You can also get cases where Grace is unhappy because > it's being fed too large a data set (though it will usually plot OK). > To address both these problems, I just added a new option that allows > averaging the data points down to a smaller number before feeding them > to Grace. It makes a modest difference in speed (because it still has > to loop through the main log file to pull out the individual server > data) but keeps Grace happy and makes the long term plots a bit smoother > looking. I plan to upload that version by the end of the weekend.
What I want to eventually do is make it a munin plugin. It uses RRD as a database which is designed for long term graphing. It's how my graphs are made at http://rikku.vrillusions.com/ntp/ . It actually generates graphs up to a year long, I just copy the daily one to that page. And the way RRD databases work there's very little processing going on. You just take the current value and throw it in the database, it then stores it so that the number of datapoints is about the same for each term. So the daily one would store each 5 minute value, the weekly one may only store the every half hour one, etc. I'll be sure to mention it on here whenever I get around to actually making this.
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