4 ms·
Some research yes. To answer your final question directly - more like hourly. Google did a big study in 2009 [0] and found error rates between 2.4E-11 and 6.7E
by ljcn 9y ago
Some research yes. To answer your final question directly - more like hourly.
Google did a big study in 2009 [0] and found error rates between 2.4E-11 and 6.7E-11 errors/bit-hour, or, in more familiar units: about 1 error per 2-GByte of memory per hour.
Obviously most errors go unnoticed, but for anything where random bit flips are unacceptable, ECC is necessary.
Note too that error rates go up with memory density, not down, so things might be worse with more recent chips.
[0] http://www.cs.toronto.edu/~bianca/papers/sigmetrics09.pdf http://www.cs.toronto.edu/~bianca/papers/sigmetrics09.pdf
- api 9y ago> about 1 error per 2-GByte of memory per hour Wow! So that means a 16GB laptop will on average experience 8 memory errors per hour under moderate load? I had no idea it was that high. This likely explains why my Mac crashes randomly but incredibly rarely. It's like once every few months. I guess a bit flip happens at the wrong place about that often?