Like was mentioned by @Margaret Bloom in the comments, the numbers in bold refer to cache-hits. Non-bold refer to cache misses. I understand how and why the numbers are placed in the table like that. So you understand which how addresses map to cache lines, and that the vertical axis is time.
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Session Cache One of the most apparent use cases for Redis is using it as a session cache. The advantages of using Redis over other session stores, such. Click the Add button in the Custom HTTP Headers group and add 'Cache-Control' for the header name and 'no-cache' for the header value. Remember that it is not a good idea to use this header globally across the entire Web server.
But I don't understand why 2 and 5 have been bold-printed and why we got hit rate of 17%. The table entries are bold (cache hit) when the previous access to the same cache line was to the same address. A different address that maps to the same cache line causes a cache miss (evicting the old contents). Visually / graphically: look vertically upwards in the same column to see which data is currently hot in the cache line.
Obviously once you know how many cache hits there were, calculating the hit rate is easy. Normally you should just ask your professor extremely basic questions like this. However, your diagram was really easy to understand, so it made this trivial question easy to understand and answer. /best-canon-eos-utility-for-mac/.
I suddenly started to encounter ‘time-out’ error messages with certain sites – yours being one of them! On looking further, I could not find any logic to the dozen or so sites I regularly visit being unavailable. I tried accessing these sites through an online – the sites loaded. I re-booted and ran all the adware / / programs – all to no avail. I managed to Google the problem and found some obscure forum with the response ‘go to command line prompt and type “ipconfig /flushdns” ‘ which I duly did. Perfect – problem solved – but why did I need to do this, what is a cache flush and how can I avoid this problem in the future?
Well, I can’t really say why that fixed your problem, since a is also another way of flushing your DNS. In fact, it’s one of the many reasons tech support folks insist you reboot as the first step when investigating just about anything. Blackmagic disk speed test for windows 10.
But you seem to indicate that a reboot actually didn’t help. However, flushing the DNS cache can sometimes help, and it’s much faster than a reboot. Become a and go ad-free! DNS First, a quick review of what DNS is. DNS is an acronym for the Domain Name System.
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As you probably already know, every device on a is identified by an IP (Internet ) address. However, you and I rarely know or care what the IP addresses are; we use names instead, like “askleo.com”. DNS is what maps from names to IP addresses. When your computer accesses a domain name for the first time, it performs what’s called a DNS request, which boils down to asking “Hey, what’s the for ‘askleo.com’?” Your computer is querying a DNS server whose job it is to answer exactly those kinds of questions.