{"id":930,"date":"2015-12-29T13:10:26","date_gmt":"2015-12-29T13:10:26","guid":{"rendered":"http:\/\/haisins.epac.to\/wordpress\/?p=930"},"modified":"2015-12-29T13:10:26","modified_gmt":"2015-12-29T13:10:26","slug":"%ec%9d%b4%ec%83%81%ec%a0%81%ec%9d%b8-%ec%8b%9c%ec%8a%a4%ed%85%9cideal-system%ec%9d%98-%ec%9a%94%ea%b1%b4","status":"publish","type":"post","link":"http:\/\/haisins.synology.me\/wordpress\/?p=930","title":{"rendered":"\uc774\uc0c1\uc801\uc778 \uc2dc\uc2a4\ud15c(Ideal System)\uc758 \uc694\uac74"},"content":{"rendered":"

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>> High but not full CPU utilization (70~90%) <\/SPAN><\/P>
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>> CPU Time spent in user application (85+% in user)<\/SPAN><\/P>
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>> Low Disk utilization (5~15% for each disk)<\/SPAN><\/P>
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>> Low Network utilization (10~30% per network, less 5% of collision)<\/SPAN><\/P>
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2. <\/SPAN><\/B>\ud29c\ub2dd\uc758 \uc77c\ubc18\uc801\uc778 \ubaa8\ub378<\/SPAN><\/B><\/P>
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  Agree level of Performance to reach<\/SPAN><\/P>
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-><\/SPAN><\/P>
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Gather Data using monitoring tool(vmstat, iostat, netstat,…)<\/SPAN><\/P>
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Analyze Data<\/SPAN><\/P>
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Work from the biggest bottleneck first<\/SPAN> <\/FONT><\/SPAN><\/P><\/TD><\/TR><\/TBODY><\/TABLE><\/P>
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 <\/SPAN>\uc8fc\uc758: <\/SPAN>\uc2dc\uc2a4\ud15c\uc758 \uc131\ub2a5(Performance)<\/SPAN>\uc740 \uc2dc\uc2a4\ud15c\uc758 \ub9ac\uc18c\uc2a4\ub97c \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ud558\ub290\ub0d0\uc5d0 \uc88c\uc6b0\ub41c\ub2e4.<\/SPAN><\/SPAN><\/P>
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 <\/SPAN>3. <\/SPAN><\/B>\ud29c\ub2dd\uc758 \uc77c\ubc18\uc801\uc778 \uc21c\uc11c<\/SPAN><\/B><\/P>
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1st. Application Tuning<\/SPAN><\/P>
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2nd. DataBase Tuning<\/SPAN><\/P>
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3rd. OS Tuning(System Tuning)<\/SPAN><\/P>
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4. <\/SPAN><\/B>\uc2e4\ud589\uac00\ub2a5\ud55c \uba87\uac00\uc9c0 \ubaa8\ub2c8\ud130\ub9c1 \ud234<\/SPAN><\/B><\/P>
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– vmstat<\/B> : command to view status of memory and CPU<\/SPAN><\/P>
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– ps<\/B> : command to find which process are hogs<\/SPAN><\/P>
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– swap<\/B> : command for available swap space<\/SPAN><\/P>
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– iostat<\/B> : command for terminal, disk, cpu utilization<\/SPAN><\/P>
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– netstat<\/B>, nfsstat<\/B> : command for network performance<\/SPAN><\/P>
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– sar<\/B> : command to view system activity (need SUNWaccr, SUNWaccu packages)<\/SPAN><\/P>
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– mpstat<\/B> : command to view status of multi-cpu<\/SPAN><\/P>
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– truss<\/B> : command to trace system calls what is going on<\/SPAN><\/P>
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– cachefs<\/B> : mechanism to speed up read-mostly NFS<\/SPAN><\/P>
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– PrestoServe<\/B> : application for synchronous writes (many small files, Mail server)<\/SPAN><\/P>
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– DiskPak<\/B> of Eagle company : application for fragmented disks<\/SPAN><\/P>
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5. <\/SPAN><\/B>\ud78c\ud2b8 : <\/SPAN>\ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac\uc2dc\uc2a4\ud15c \ud29c\ub2dd<\/SPAN><\/B><\/P>
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