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On Apr 25, 2016 14:45, "Henry Spanka" <<a href="mailto:henry@myvirtualserver.de">henry@myvirtualserver.de</a>> wrote:<br>
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> Hi OpenVZ community,<br>
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> We’re currently having our swap partition on SSDs as it affected the overall performance of our system(high HDD Swap usage before). Unfortunately the SSDs are dying very fast and I’m currently considering just removing the swap completely but we still want to offer Swap to our customers. I’ve read about vSwap(<a href="https://openvz.org/VSwap">https://openvz.org/VSwap</a>). How is the behavior when the container has swap assigned but the node has no swap at all. Does it just get virtually swapped in the RAM(if enough available) or is there a limitation? Upgrading the RAM rather than buying two expensive SSDs(RAID 1) is cheaper for us so that would be a very nice solution. Anyone experience with this setup?<br>
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<p dir="ltr">Real swapping occur only if there is not enough RAM on the system. So, if you see lots of swapping going on, you can either add more RAM or move some containers to another system. You can use vzoversell to quickly check the level of overcommitment as well as current RAM usage. In general, it makes sense to not oversell much as excessive swap negatively affects system performance, but it's good to have some swap space configured to handle occasional RAM shortage (as otherwise OOM killer would be used which is worse than swapping).</p>
<p dir="ltr">Kir.</p>