Phan mem gian diep, tap tin bi loi cua Windows va cac phan mem kem chat luong thuong la nguyen nhan lam cho may tinh hoat dong ngay cang cham. Tuy nhien, du da thuc hien tinh chinh he thong, go bo bot phan mem va cai lai Windows ban van khong the ngan duoc su giam sut hieu suat hoat dong do phan cung gay ra. That may, Windows XP/2000 cung cap vai cong cu giup nguoi dung kiem soat hien tuong "that co chai" o phan cung he thong. Tien ich System Monitor cua Windows co kha nang theo doi lien tuc hang tram thong so hoat dong cua Windows va ghi lai chung trong cac tap tin nhat ky (log) de de tim kiem va xu ly. Muon khoi chay System Monitor trong Windows XP/2000, ban nhan Start.Run, go vao lenh perfmon, va an . Chon System Monitor trong khung cua so ben trai, roi sau do nhan chuot vao dau cong + tren thanh cong cu o cua so ben phai de bo sung them bo dem (counter) – hay noi chinh xac la cam bien; ket qua tu cac bo dem nay se cho biet hieu suat hoat dong cua may tinh o che do thoi gian thuc. Tiep den, chon loai doi tuong can ghi nhan (nhu CPU, trinh duyet, ket noi mang...) tu trinh don tha xuong Performance object, sau do chon loai bo dem tu danh sach duoc liet ke (neu danh dau vao tuy chon Select counters from list), va nhan Add (Hinh 1). Ngoai ra, ban co the nhan nut Explain de xem phan giai thich cho tung bo dem.  Cac do thi cua System Monitor se giup ban phat hien cac khu vuc gap su co, nhung tot nhat ban nen danh gia cac chi so ve hieu suat hoat dong cua may tinh trong nhieu gio (hay tham chi vai ngay). Viec ghi lai cac so lieu nay vao mot tap tin (log) co the duoc thuc hien de dang nho Microsoft cung cap mien phi phan mem Performance Monitor Wizard.
Nhieu bo dem trong System Monitor ghi nhan cac thong so ky thuat "kha la”, tuy nhien cung co vai thong so giup ban xac dinh co can nang cap RAM, CPU hay dia cung moi khong. De biet them thong tin ve cac bo dem cua System Monitor, ban co the tai ve sach dien tu The Art and Science of Performance Monitoring cua tac gia Guy Thomas.
Sau day la vai bo dem ma ban can quan tam khi su dung System Monitor.
RAM: Hai bo dem rat huu ich co trong nhom doi tuong Memory la Available Bytes va Pages/sec. Bo dem thu nhat cho biet dung luong bo nho RAM vat ly (bo nho thuc) ma Windows co the su dung, trong khi bo dem thu hai cho biet so lan du lieu can chuyen doi giua bo nho ao (su dung dung luong dia cung) va bo nho thuc. Neu gia tri cua Available Bytes giam xuong xuong duoi 10% cua dung luong RAM va Pages/sec co tri so tang mot cach dang ke, thi nhieu kha nang may tinh cua ban khong du bo nho thuc de cung cap cho cac chuong trinh dang xu ly. Tinh nang nay thuong duoc su dung de quyet dinh xem co nen nang cap RAM cho mot may tinh hay khong.
CPU: Bo dem % Processor Time trong nhom Processor cho biet muc do su dung CPU cua may tinh. Qua trinh khoi dong cua cac phan mem cung nhu nhieu tac vu khac co the day gia tri nay len muc tren 90% den duoi 100%. Tuy nhien, trong qua trinh lam viec, neu bo dem nay van kien dinh giu muc tren 80% thi nhieu kha nang CPU khong du cong suat de ganh vac cong viec cua he thong. Neu dang su dung loai CPU 2 nhan (hay con goi la loi kep), ban co the chon bo dem rieng cho moi nhan, hoac mot bo dem chung cho ca hai.
Dia cung: Bo dem % Disk Time trong nhom PhysicalDisk se hien thi thoi gian ma dia cung can su dung de doc hay ghi du lieu. Neu may tinh duoc trang bi nhieu dia cung, ban co the chon dia cung cu the de theo doi (ngoai ra, neu may tinh su dung nhieu dia cung o che do RAID, hay su dung bo dem % Disk Time trong muc LogicalDisk Performance). Neu gia tri % Disk Time dat tu 40 den 50%, ban can thay dia cung moi.
Theo PC World VN Article source http://w4rum.com/178.t
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