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  Statistics on StackExchange

StackExchange is the most popular and professional IT Q&A site, Under StackExchange, there is StackOverflow and other sub sites. Many of us may wonder how this mega site is maintained and what its performance is. A performance page has been released by StackExchange recently.Below is some statistic about this mega site.560 million page views per month, i.e around 1.9 million PVs per day.For such as big site, it has only 9 web servers and 4 SQL servers(while two of them are in backup mode)185 requests per second, 559 million SQL queries per day with peak rate at 10,700 queries/secTwo redis ...

4,839 0       STATISTIC STACKOVERFLOW


  How Many C Programs Are There?

If I choose a size S, can you tell me how many valid C programs exist that are no larger than that size? I’m actually interested in the answer — it’ll help me make a point in a paper I’m writing. Shockingly, the Internet (or at least, the part of it that I looked at based on a few searches) does not provide a good answer.Let’s start with a few premises:Since it would be exceedingly difficult to construct the exact answer, we’re looking for a respectably tight lower bound.S is measured in bytes.Since it seems obvious that there’s an exponential n...

2,284 0       NUMBER C PROGRA STATISTIC CALCULATION