Date: Fri, 18 Mar 2016 14:26:14 +0800 (CST) From: huanghwh <huanghwh@163.com> To: freebsd-virtualization@freebsd.org Subject: Poor disk performance of FreeBSD under AWS Message-ID: <4a285458.9323.15388672651.Coremail.huanghwh@163.com>
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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. any ideas? Huang Wen Hui & ޭy *bͫbwyvj|ӽ4ߝפ^=a ޭy *bͫbwyv bu: 盱ۚ,ڶ*'yvE ~& _盱+lu~nh]}M獴}ռj)fj|y _ "13t 8~߭盱ۚ,ڶ*'yvƫMzӽ4ߟML'hhnjx! z&E ~&]}z&]}z&m5]wmlu~nhDLנ]t+~nonjXjبy -|1^M74E zZ)yp^r( ڶ
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