How can I increase my virtual memory

I am starting this question despite it seems like this question, but it isn't. I am getting different outputs from the commands as given in that question. Now I want to show you my scenario. From my knowledge of operating systems, virtual memory is used to swap the files from main memory which are not used frequently and free up space for other active programs and files. My MySQL Database Server is getting killed by own, and I don't know why, and I think this is because of the Virtual Memory. So, I want to increase my Virtual Memory. I read from this link, but again the outputs are a bit different like I don't have some like sda1 or something. I don't have any knowledge of Linux so please explain in more basic terms. I don't know any command neither know what a command does. Here some of the outputs of the commands. swapon -s Filename Type Size Used Priority /dev/null partition 524288 516556 -1 free -m total used free shared buffers cached Mam: 1024 734 289 128 0 74 -/+ buffers/chahe: 660 363 Swap: 512 504 7 df -h Filesystem Size Used Avail Use% Mounted on /dev/simfs 40G 3.1G 37G 8% / none 256M 4.0K 256M 1% /dev **So please tell me how can I increase the Virtual Memory size?** **Edit** This question marked duplicate but again my terminal giving different output than in this answer . dd if=/dev/zero of=/raid1/swapfile bs-1M count=8192 dd : opening `/raid1/swapfile': No such file or directory I don't have idea what a mdadm RAID is.