Im not asking how much RAM/CPU my website(s) will need to run, but if it is possible to determine a relation between CPU and RAM. Is there a relation? When I want more CPU and when I want more RAM to assure a smooth run of my website?  edit: Im more interested in relation between required CPU and RAM and what processes (plug-ins in my case) affect more on CPU and what other more on the RAM. For example, would make sense to have a 2,5GHz Hexa-Core with 2 GB RAM? Or an app requiring such CPU would more likely need more RAM aswell? Similarly, would make sense to have a Single Core loaded with 16 GB RAM?
This is a  about  Related:      I have a question regarding capacity planning. Can the Server Fault community please help with the following:   What kind of server do I need to handle some number of users? How many users can a server with some specifications handle? Will some server configuration be fast enough for my use case? I'm building a social networking site: what kind of hardware do I need? How much bandwidth do I need for some project? How much bandwidth will some number of users use in some application?
Is there a standard for public key encrypting and signing short messages? Some systems, that operate over flaky bearers, need to send signed, encrypted messages that are entirely self contained - i.e. send a single 300 byte UDP rather than have a 10Kb, two-way, certificate conversation over TCP.  Assume the destination has a private key and already knows the source's public key, and the source has a private key and already knows the destination's public key.  Given this assumption, is there a standard for encrypting/signing a small, but arbitrary length, message?  (I'm well aware of the dangers of rolling my own encryption scheme.)  Would there be a minimum ciphertext size that is related to the public key size?  (I'm thinking plain PKI encryption for plaintexts shorter than the key, and a PKI encrypted AES key for longer plaintexts.) if $a,b$ are nilpotent elements of a commutative ring $R$, show that $a+b$ is also nilpotent From the TV Show Krypton, Dru-Zod is the son of Seg-El and Lyta-Zod. In S02E05 'A better yesterday', Lyta-Zod's throat gets slit by Jax-Ur leading to Lyta's death. How is Dru-Zod still alive? Shouldn't he be wiped from existence? Setting up PyCharm to reference ArcPy? How would I setup  to recognize import arcpy?   I'd like to use PyCharm to develop and debug geoprocessing tool. Suppose $f$ is a differentiable function over $\mathbb{R}$ satisfying $f(0) = 0$. Show that if $f'$ is strictly increasing, then $\frac{f(x)}{x}$ is increasing over $(0,\infty)$.   Attempt:  Since $f'$ is increasing we know that $f'' &gt; 0$ for all $x$. Now let $g(x) = \frac{f(x)}{x}$ and thus $f(x) = xg(x)$. Then we wish to show that $g'(x) &gt; 0$ on $(0,\infty)$ and so since $f'(x) = xg'(x)+g(x)$ and $f''(x) = xg''(x)+2g'(x) &gt; 0$, we have $g''(x) &gt; \frac{-2g'(x)}{x}$. I am not sure how to use this though to prove the statement. Remove last character from line I want to remove last character from a line:  [root@ozzesh ~]#df -h | awk  '{ print $5 }' Use% 22% 1% 1% 59% 51% 63% 5%  Expected result:  Use 22 1 1 59 51 63 5 Prove that $\mathbb{|Q| = |Q\times Q|}$ How to show $\sum_{k=0}^{n}\binom{n+k}{k}\frac{1}{2^k}=2^{n}$ What is the limit of This is a general, community wiki  question and answer pair intended to address any questions   concerning the reasons a site or specific site contents do not appear   in search engine results.      If your question was closed as a duplicate of this question and you   feel that the information provided here does not provide a sufficient   answer, please open a discussion on .   My site (or specific pages on my site) is not appearing in search engine results.  Why isn't my content indexed and what can I do about it? Use masks as part of materials in cycles Is there any software or hardware which lets you stop, slow down, speed up or even reverse time? Obviously I'm talking about time in terms of the PC clock rather than real time.  We were testing an application we've developed at work by setting the clock forward and back to simulate different scenarios and I started thinking how useful it would be if you could adjust the rate(?) of the system clock with finer control. So you could make a minute pass in a second or a day pass in 30 seconds and watch how the program you're developing copes with changes in date and time.  Is there any such software available?   I'd be interested to hear if anyone knows of any software or hardware which can let you do some or all of the above. What's the Best Way to Shuffle an NSMutableArray? If you have an NSMutableArray, how do you shuffle the elements randomly?  (I have my own answer for this, which is posted below, but I'm new to Cocoa and I'm interested to know if there is a better way.)    Update: As noted by @Mukesh, as of iOS 10+ and macOS 10.12+, there is an -[NSMutableArray shuffledArray] method that can be used to shuffle. See  for details. (But note that this creates a new array, rather than shuffling the elements in place.) Terminal appears with much delay when shortcut is used When I press Ctrl+Alt+T the Terminal opens after around 30 seconds. That's pretty annoying. If I open it with Alt+F2 and enter gnome-terminal the window appears instantly as usual.  I'm using Ubuntu 16.04 with gnome3.  Thank you for your help in advance! Youtube says "This video is currently unavailable" How to prove $\int_{-\infty}^{+\infty} f(x)dx = \int_{-\infty}^{+\infty} f\left(x - \frac{1}{x}\right)dx?$ If $f(x)$ is a continuous function on $(-\infty, +\infty)$ and $\int_{-\infty}^{+\infty} f(x) \, dx$ exists. How can I prove that $$\int_{-\infty}^{+\infty} f(x) \, dx = \int_{-\infty}^{+\infty} f\left( x - \frac{1}{x} \right) \, dx\text{ ?}$$ Why is there not a simpler way to calculate the standard deviation? Steps of getting standard deviation. :        Work out the average (mean value) of your set of numbers   Work out the difference between each number and the mean   Square the differences   Add up the square of all the differences   Divide this by one less than the number of numbers in your set -   this is called the variance   Take the square root of the variance and you've got the standard   deviation      Am I missing out something, or why do we need to square the differences in step 3?  Why not simply do a Abs (multiply all negative numbers by -1) in step 3?  Also, my second question is why do we need to divide by one less than the number of numbers in the set in step 5? why not simply divide by the number of numbers? Which of the following sentences is correct:        There is a lot of food and fruit in the supermarket.   There are a lot of food and fruit in the supermarket. Google calendar sharing I am a Google Apps administrator in the process of transferring a multitude of secondary calendars from a previous Google account. So following advice from  I did the following:  Old Account   Download calendar and save as ICS   New Administor Account   Create new calendar Select "Share Calendar With Others", "Share calendar with everyone in the organization - see all event details"    However nobody in the organization can see the new calendar under "Other Calendars" nor do they get any form of notification.   It seems everyone in the organization has to now somehow add this calendar(s) via "Add a colleague's calendar" OR I have to add each user's new Google account. This is turning into an administrative nightmare.  The behavior I want is:   Maintain a list of calendars that everyone in the organization has access to By default all users in organization have "See All Event Details" access. Certain organization users have "Make Changes To Events" and Apps Administrators have "Make Changes AND Sharing" As users are added/removed to the Google Apps domain the access to these calendars are automatically granted/revoked ie. Organization users should not have to do anything to get access to the list of calendars.   I am sure there is a simple solution to this that I am missing, so if someone can point me in the right direction I would appreciate it. Where did Harry's parents get all of their money from?