Need Some Suggestions on a 512MB KVM

ianirban

I have a 512 MB kvm for a single website.

My VPS congiguration is:

OS: CentOS 6.5 64Bit,
1 CPU Core @ 2.6 Ghz,
512 Mb RAM,
30 GB SAS HDD

my memory usage for this week is: (I installed the vesta cp just last week and I had done a restart in between):

and result of free -m command:

I just wanna know is this quite normal or just fine as of now ? my website visitor statistics for December,2014 is:

So seeking your advice on this regard, if it is absolutely fine or I should upgrade to 1GB asap or anything like that. FYI I dont think there will be any sudden traffic increase in future. and I have not so much of time to manage via command prompt as I know panel is also a burden over RAM.

thanks in advance.

bertan

CentOS or Debian? 64-bit or 32-bit?

ianirban

@bertan said:
CentOS or Debian? 64-bit or 32-bit?

oops sorry I forgot to mention, it is centos 64 bit.

Abdussamad

RAM is much faster than secondary storage devices. Linux is designed to maximize use of RAM. It operates on the principle that unused memory is wasted memory. RAM is used to cache frequently accessed files and programs.

To find out how much free RAM you actually have run free -m and look at the second line (- buffers/cache line). Until you tell us the output of that command we can't make any recommendations.

Nyr

As @Abdussamad said, the memory usage is fine.

If your website is loading fast and steady, most likely you don't need to worry about upgrading

ianirban

@Abdussamad said:
RAM is much faster than secondary storage devices. Linux is designed to maximize use of RAM. It operates on the principle that unused memory is wasted memory. RAM is used to cache frequently accessed files and programs.

To find out how much free RAM you actually have run free -m and look at the second line (- buffers/cache line). Until you tell us the output of that command we can't make any recommendations.

I have included the free - m result.

Nyr

@ianirban said:
I have included the free - m result.

You are only needing half of your available RAM

ianirban

@Nyr said:
You are only needing half of your available RAM

sorry dude, did not get you. can you please explain a bit ?

Abdussamad

Yup you have plenty of free RAM. I suggest running free -m when traffic is at its peak. Remember it's the second line that matters.

Also keep a close eye on logs. If it runs out of memory it will log in /var/log/messages most likely. Apache logs will also tell you if you are hitting max clients. That isn't so bad if it happens occasionally but if it becomes a regular occurrence you will have raise maxclients and that will require more RAM.

ianirban

@Abdussamad said:
Yup you have plenty of free RAM. I suggest running free -m when traffic is at its peak. Remember it's the second line that matters.

Also keep a close eye on logs. If it runs out of memory it will log in /var/log/messages most likely. Apache logs will also tell you if you are hitting max clients. That isn't so bad if it happens occasionally but if it becomes a regular occurrence you will have raise maxclients and that will require more RAM.

thanks a lot. I did not even bother to check it before ever. now I will definitely check it regularly. nginx is also installed. should I check its logs also ? can you please mention me the exact location of apache and nginx logs if you dont mind.

Abdussamad

ianirban said: thanks a lot. I did not even bother to check it before ever. now I will definitely check it regularly. nginx is also installed. should I check its logs also ? can you please mention me the exact location of apache and nginx logs if you dont mind.

You are using nginx as a reverse proxy? Nginx can handle a lot of concurrent users with minimal memory usage so that's pretty good. I thought you were using just Apache.

For centos the logs will be in /var/log/httpd for apache and maybe /var/log/nginx for nginx.