4 ms·

Memory errors happen all the time, at least they did several years back when the Google server farm saw "an average of one single-bit-error every 14 to 40 hours

Memory errors happen all the time, at least they did several years back when the Google server farm saw "an average of one single-bit-error every 14 to 40 hours per Gigabit of DRAM": http://www.intelligentmemory.com/support/faq/ecc-dram/how-often-do-ecc-correctable-single-bit-errors-occur-and-how-about-double-multi-bit-errors.php http://www.intelligentmemory.com/support/faq/ecc-dram/how-of... This translates to "a mean of 3,751 correctable errors per DIMM per year": http://www.zdnet.com/article/dram-error-rates-nightmare-on-dimm-street/ http://www.zdnet.com/article/dram-error-rates-nightmare-on-d... I'm not sure how things pan out these days with newer memory types. ECC checks and fixes these errors so they're not an issue.

dis-sys 9y ago
Citing the results of a paper in which they studied the errors observed mostly on DDR1 memory? A far more recent study by CMU based on the entire fleet of Fb servers shows that correctable error rates dropped dramatically in the past decade. http://repository.cmu.edu/cgi/viewcontent.cgi?article=1345&context=ece http://repository.cmu.edu/cgi/viewcontent.cgi?article=1345&c...
- flamedoge 9y ago
  [Unless it's obvious to others,] paper doesn't conclude that DDR1 to DDR3 discrepancy correlates to error rate. It only concludes from empirical measurements that memory density scales with error rate (2).
- ChuckMcM 9y ago
  Here is a better paper to cite: https://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf https://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf