Date: Sat, 24 Apr 2021 09:25:00 +0000 From: dashdruid <dashdruid@protonmail.ch> To: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: FreeBSD 13.0 terrible performance in KVM Message-ID: <AKYOQu-q6fYoMOt_DBnDKFsHwIX2WYQiAsy0IqDO39auUExYH6L8mVG0mrSKW9G-XRSPjeuB9NxrZsYPira8Gv4NodyIx7z4w_iqxjJwS-Y=@protonmail.ch>
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Hello List, I hope some other folks out there running FreeBSD on KVM as well. I set up = a base VM while doing so I noticed that the disk operations are very slow. = Many times I edit a file in vim or try to run a command there is a huge lag= . I use UFS as the root filesystem. To have something to compare it with I ha= ve tested it against an OpenBSD 6.6 VM on the same host, same hardware. bot= h have 1 vCPU and 1GB of ram, 20GB virtual disk (they are exactly on the sa= me physical disk no raid or anything to have a fair comparison). Here is an example simple file search time for a non-existent file: FreeBSD 13 time find / -name cacert.pem real 0m30.656s user 0m0.516s sys 0m3.938s Second run even worse real 2m38.618s user 0m0.711s sys 0m6.882s While on the OpenBSD VM I get time find / -name cacert.pem real 0m2.258s user 0m0.290s sys 0m1.970s The amount of data is about the same on both systems but I would not consid= er this a "slight" performance degradation. If the base system is so slow t= hen imagine putting Apache and other servers on top of it. Did anyone run i= nto this? Unless there is a definitive solution I will opt out to using other BSD var= iants.
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