> Before the BadBlocks the graph was created in under a second, now it takes > 3(!) minutes. During creation the cpu load is at 100%
You might like to check the class rating of the SD card you are using in your Pi. Anything under a 6 is too slow, and really, you should try for a class 10 as RRDTool has a lot of IO and is usually IO bound. This can make a big difference on the speed of things; also using the cheaper brands is false economy... I've had problems onRasPi in the past using cheapo Apacer class6 cards instead of the decent branded class10 ones. Steve Steve Shipway [email protected]
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