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74 lines
2.3 KiB
HTML
74 lines
2.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="description" content="">
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<meta name="author" content="Nathan (Aney) Steel">
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<meta name="theme-color" content="white">
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<meta name="theme-color" content="black">
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<link rel="stylesheet" type="text/css" href="/main.css">
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<link rel="icon" type="image/png" href="/images/favicon.svg">
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<title>KVM Optimisation</title>
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</head>
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<body>
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<header>
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<a href="#main" class="vh">Jump directly to main content</a>
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<h1>KVM Optimisation</h1>
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<input id="burger-toggle" type="checkbox"/>
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<label class="burger-container" for="burger-toggle"><div class="burger"></div><span class="sr">Burger menu</span></label>
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<a href="/">home</a>
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<main id="main">
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<section>
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<h2>KVM Optimisations</h2>
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transmit queue
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virsh domiflist <vm>
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# this is then the txqueuelen change below ???
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# changing to 4096
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ifconfig <interface_name> txqueuelen <length>
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txqueuelen (iwbcman comment)
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defaults to 1000, apparently 200 is good
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ip link set eth0 txqueuelen 200
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vim /etc/network/interfaces
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add
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post-up /sbin/ip link set eth0 txqueuelen 200
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to the end
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If virtual hdd is slow can try
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Cache mode: none (not default!)
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I/O mode: native<Paste>
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https://unix.stackexchange.com/a/48584
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non caching on dirves?
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https://blog.jdpfu.com/2012/07/30/improving-kvm-performance
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://documentation.suse.com/smart/linux/html/concept-virtual-disk-cache-modes/concept-virtual-disk-cache-modes.html#:~:text=A%20disk%20cache%20is%20a,example%2C%20by%20setting%20its%20type.
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On VM turning cache off essentially acts like accessing the drive itself. No exactly a passthrough, but decent enough
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http://www.linux-kvm.org/page/Tuning_KVM
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<hr/>
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<p>Written by <a href="https://aney.co.uk" target="_blank" rel="noopener">@aney</a> with <a href="https://danluu.com/web-bloat/" target="_blank" rel="noopener">web bloat</a> in mind | <a href="https://github.com/Aney/website" target="_blank" rel="noopener">Source Code</a></p>
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