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This command will show memory usage sorted by virtual memory size: ps auwx --sort -vsz This will show memory usage sorted by real size: ps auwx --sort -rss That should lead you in the direction of seeing what's taking up memory.


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"Is it worth it ?" Perhaps "What does it do, and why do I want that" is a better question. First, it is up to the CPU Mfg. to create a CPU with the capability (since, unlike RAID or ECC Memory internal CPU Hardware support is required), but the actual implementation in SPARC , POWER, x86, etc., can vary (and be improved over the years; thus the need to ...


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It really depend on how little is your business and how much your budget is constrained. I generally avoid machines without ECC memory, but for some very small business with very low budget (which very often have normal PC repourposed as server) something as a Dell T20 (without ECC memory) is the only way to go. Note that when using a filesystem with ...


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When running a database, I wouldn't want a bit to be flipped in it. Hopefully your database solution does a bit of input checking/sanity checks? I'd say; pay a bit extra for quality hardware. Also, Synology runs a fileserver, sitting on top of error-correcting RAID. A bit-flip on the synology might still cause a single corrupt file, but you have a roll-back ...


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Are you experiencing any site performance issues? The thing with Linux is that it's not a bad thing for top to show that all your RAM is in use. Try giving us the output of free -m. When an application is finished with the memory it used, the kernel doesn't immediately purge the pages of data and mark it as free memory again. For instance, my desktop VM I ...


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WordPress uses a lot of RAM - and cpu. There's not much to do, than to upgrade your server if you want to continue using WordPress. The alternate could be to use another system for your server, or get someone to code your website. In that way, the RAM-usage will not be as high - if the coder does his job right, of course. Not sure if this helped, but that's ...


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While it is true that kernel uses swap even if there may be memory left, using more than two thirds of it may be an indicator that historically the server may have been running out of memory and that is why it started swapping. I would correlate swap usage with memory usage in the sar reports to deduce whether the system has enough ram. I would also check ...


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The Linux Kernel starts to swap out memory pages even if you have plenty of ram free. You can fine tune this behaviour by setting a custom swappiness. http://en.wikipedia.org/wiki/Swappiness For servers, I'd recommend to set the swappiness to 1 if you have always enough memory for your workload. For workstations, I'd recommend using the default of 60. # ...


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The biggest thing to watch are page faults. On most Linux systems, running ps -o min_flt,maj_flt will give you some cumulative statistics, but real-time isn't always good enough. SAR is probably your biggest friend when it comes to checking out overall health of the system, including memory, processor, network, etc... Check out the man page for sar for ...


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ESXi doesn't support hot-removing memory or CPUs from a VM. Someone I met in the pub a couple of months ago told me that the sister of a friend of his cousin *cough* got the answer that virtually no customer demands this feature. In other words: It doesn't pay to bother implementing hot-remove. If you want ESXi to support this, go to VMware and tell them. ...


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Are you experiencing any issue? What does your RAM usage looks like? (ex. free -m) It's perfectly normal for Linux to use whatever's RAM available for caching - some of it will show through slabtop (dentries, inodes, etc.) and the rest through free -m' cached memory (pagecache/swapcache). /proc/sys/vm/vfs_cache_pressure controls the proportions by which ...


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I can not say for sure in vmware, but when using kvm decreasing memory of a running virtual machine works fine. Of course up to a limit, but the software will tell you. When you decrease it the memory in the virtual machine will gradually be lowered, until it can't be lowered any further. If you set the memory to be lower than where it stopped you will need ...


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I had the same problem with debian wheezy 7.8 guests. Installing the wheezy backports kernel 3.16.0-0.bpo.4-amd64 solved it for me. This was on the guests, I didn't touch the host. Add the following line to /etc/apt/sources.list: deb http://ftp.uk.debian.org/debian/ wheezy-backports main Then run apt-get update apt-get -t wheezy-backports install ...


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Why wouldn't you just correct the order? There's no reason to "what if" when you KNOW that this is not a recommended configuration. As for whether it will work, you will see once the server completes its POST. But I don't think it's necessary to play that game. Do you want to do this the right way? If so, spec and arrange the RAM according to the DIMM ...


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No, it is just a live storage replication. Replication occurs asynchronously, periodically. Automatic failover would be created via script. See http://blogs.technet.com/b/keithmayer/archive/2012/10/05/automate-disaster-recovery-plan-with-windows-server-2012-hyper-v-replica-and-powershell-3-0.aspx as an example. Typically replica is used for DR, and ...


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You may need to increase your Pagefile size, to be able to handle intermittent spikes in the memory commit size. We have this issue often in Azure compute where Pagefile is set WAY too low by default for memory-intensive apps. You can read more here: http://mvolo.com/low-pagefile-can-cause-503-service-unavailable-on-azure-web-roles/ This will not solve the ...


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Memory compatibility is always a toss-up, unless you get the OK from someone who's tried the exact same memory in the exact same system. That being said, I haven't heard of a case where inserting incompatible memory caused the magic blue smoke to escape from a system. At worst, it won't POST or you get an unstable system. So, try the off-brand memory and ...



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