Date: Fri, 18 Mar 2016 18:44:58 +0800 From: Julian Elischer <julian@freebsd.org> To: huanghwh <huanghwh@163.com> Cc: freebsd-virtualization@freebsd.org Subject: Re: Poor disk performance of FreeBSD under AWS Message-ID: <56EBDC2A.1020304@freebsd.org> In-Reply-To: <91dc4bd.a112.15388868b7d.Coremail.huanghwh@163.com> References: <4a285458.9323.15388672651.Coremail.huanghwh@163.com> <91dc4bd.a112.15388868b7d.Coremail.huanghwh@163.com>
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On 18/03/2016 3:00 PM, huanghwh wrote: > BTW, with 1G ram configuration, vi can exit very quickly. > At 2016-03-18 14:26:14, "huanghwh" <huanghwh@163.com> wrote: >> I have a EC2 server in AWS, 4CPU+16G ram, FreeBSD 10.2R. >> >> Use two command dd and vi: >> dd if=/dev/zero of=/.swap bs=1M count=8192 & >> >> 8589934592 bytes transferred in 117.074462 secs (73371549 bytes/sec) >> >> when dd run in background, input vi command to edit a small txt file "d.txt" at same time, >> >> and then write and quit immediately: >> >> >> /usr/bin/time vi d.txt >> >> >> 49.82 real 0.00 user 0.00 sys >> >> in top command show: >> 810 root 1 23 0 12344K 2524K wswbuf 0 0:04 5.76% dd >> 821 root 1 20 0 23448K 4092K wdrain 0 0:00 0.00% vi >> >> vi need almost 50 seconds to quit. I think some people are already looking at this.. it's not limited to AWS. >> any ideas? >> >> Huang Wen Hui >> >> _______________________________________________ >> freebsd-virtualization@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization >> To unsubscribe, send any mail to "freebsd-virtualization-unsubscribe@freebsd.org" > _______________________________________________ > freebsd-virtualization@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > To unsubscribe, send any mail to "freebsd-virtualization-unsubscribe@freebsd.org" >
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