SysMain la gi? Tong quan ve dich vu he thong quan trong
SysMain la mot dich vu he thong duoc tich hop san trong cac phien ban Windows hien dai, tu Windows Vista tro di. Truoc day, dich vu nay duoc biet den voi ten goi SuperFetch. SysMain co nhiem vu phan tich cach ban su dung may tinh, tu do tien tai cac ung dung va tep tin thuong duoc su dung vao bo nho RAM. Dieu nay giup tang toc do khoi dong ung dung va giam thoi gian doc ghi o cung. Nhieu nguoi dung thuong thac mac ve tac dung thuc su cua SysMain va lieu co nen tat no hay khong. Bai viet nay se cung cap cho ban cai nhin toan dien ve SysMain cung nhu huong dan cach tat dich vu nay mot cach hieu qua.
SysMain hoat dong nhu the nao?
Khi Windows khoi dong, SysMain tu dong chay trong tien trinh svchost.exe voi quyen LocalSystem. Dich vu nay lien tuc giam sat cac ung dung va tep tin ma ban mo hang ngay. No ghi nhan thoi diem ban su dung cac chuong trinh nhu trinh duyet web, phan mem van phong, hoac tro choi. Du lieu nay duoc luu tru de SysMain co the du doan ung dung nao ban se can tiep theo. Vao nhung gio ranh ranh, khi he thong khong hoat dong nhieu, SysMain se tien tai cac tep tin vao RAM. Khi ban click vao mot ung dung, no se mo ngay lap tuc vi du lieu da co san trong bo nho, khong can doc lai tu o cung. Co che nay giong nhu mot nguoi tro ly thong minh, giup ban tiet kiem thoi gian cho.
Loi ich cua viec de SysMain hoat dong
Ve co ban, SysMain duoc Microsoft thiet ke de cai thien hieu nang tong the. Tren cac may tinh su dung o cung HDD truyen thong, SysMain phat huy tac dung lon nhat. O cung HDD co toc do doc ghi cham hon nhieu so voi SSD. Viec tien tai du lieu vao RAM giup giam thieu thoi gian truy cap o cung, lam cho may tinh phan hoi nhanh hon. Dieu nay dac biet huu ich khi ban mo nhieu ung dung cung luc. Ngoai ra, SysMain con giup giam tai cho o cung, keo dai tuoi tho cua thiet bi. Do do, voi da so nguoi dung, de dich vu nay chay o che do mac dinh la mot lua chon hop ly.
Khi nao nen tat SysMain?
Mac du co nhieu loi ich, Sysmain khong phai luc nao cung can thiet. Mot so truong hop ban nen can nhac tat dich vu nay:
- He thong cua ban su dung o cung SSD dung luong cao va toc do nhanh. Vi SSD da co thoi gian truy xuat rat thap, viec tien tai du lieu khong mang lai nhieu khac biet. Thay vao do, SysMain co the lam giam tuoi tho cua SSD do ghi du lieu lien tuc.
- May tinh cua ban co dung luong RAM it, duoi 4 GB. Khi do, SysMain se chiem mot phan RAM dang ke, lam cho cac ung dung khac thieu bo nho. Dieu nay dan den hien tuong may tinh cham lai hoac dung hinh.
- Ban gap phai tinh trang stuttering hoac lag khi choi game. Mot so game nang co the xung dot voi qua trinh tien tai cua SysMain, dac biet khi RAM sap day. Nhieu game thu da phan anh rang tat SysMain giup tang FPS on dinh hon.
- Ban la nguoi dung chuyen nghiep muon kiem soat hoan toan tai nguyen he thong, tranh bat ky qua trinh ngam nao.
Cach tat SysMain hieu qua tren Windows
De tat SysMain, ban co the thuc hien theo cac buoc don gian duoi day. Tuy nhien, ban can co quyen Administrator de thay doi dich vu he thong. Cac buoc cu the nhu sau:
Bucc 1: Nhan to hop phim Windows + R de mo hop thoai Run. Nhap services.msc va nhan Enter. Cua so Services se hien thi danh sach tat ca cac dich vu tren he thong.
Bucc 2: Tim den dich vu co ten SysMain trong danh sach. Ban co the cuon chuot hoac go chu S de den gan. Click chuot phai vao no va chon Properties.
Bucc 3: Trong cua so Properties, nhin vao muc Startup type. Mac dinh no la Automatic (bat dau tu dong). Ban click vao o do va chon Disabled de vo hieu hoa hoan toan. Tiep theo, nhan nut Stop de dung dich vu ngay lap tuc. Cuoi cung, nhan Apply va OK de luu thay doi.
Sau khi hoan tat, ban co the khoi dong lai may tinh de dam bao dich vu khong con chay ngam. Neu muon khoi phuc lai, ban chi can thuc hien cac buoc tuong tu va chon lai che do Automatic.
Bang so sanh hieu nang khi tat va de SysMain hoat dong
| Tieu chi | Co SysMain | Tat SysMain |
|---|---|---|
| Toc do khoi dong ung dung | Nhanh hon, nhat la voi HDD | Cham hon neu dung HDD, khong khac biet voi SSD |
| Tieu thu RAM | Chiem tu 100 MB den 500 MB tuy thoi diem | Giai phong RAM cho ung dung khac |
| Tuoi tho o cung SSD | Co the giam do ghi nhieu tep tin | Giam thieu so luong ghi, keo dai tuoi tho |
| Hieu nang choi game | Co the gay stuttering neu RAM thap | Giu FPS on dinh hon trong nhieu truong hop |
Mot so luu y quan trong khi tat SysMain
Truoc khi tat SysMain, ban can hieu ro rang day la mot dich vu he thong. Mot vai ung dung co the phu thuoc vao no de hoat dong toi uu. Tuy nhien, hau het cac phan mem hien dai deu khong gap van de khi SysMain tat. Dieu ban can chu y nhat la neu may tinh cua ban van dung HDD, viec tat SysMain co the khien thoi gian khoi dong Windows lau hon. Do do, neu khong that su can thiet, ban nen de SysMain hoat dong binh thuong. Dac biet, neu ban la nguoi dung pho thong, khong lam viec voi cac tac vu nang, viec tat dich vu nay co the khong mang lai loi ich ro ret.
Su khac biet giua SysMain, SuperFetch va Prefetch
De hieu sau hon ve SysMain, ban can biet su khac biet giua no va hai thanh phan cu hon: Prefetch va SuperFetch. Prefetch xuat hien tu Windows XP, du lieu duoc luu trong thu muc WindowsPrefetch. No chi theo doi nhung ung dung duoc su dung thuong xuyen va tien tai mot phan nho. SuperFetch ra mat trong Windows Vista, phat trien hien hon bang cach phan tich theo thoi gian su dung. Vi du, no biet rang ban mo trinh duyet vao 8 gio sang moi ngay. SysMain la phien ban nang cap cua SuperFetch, tich hop nhieu thuat toan thong minh hon. No co the tu dieu chinh viec tien tai dua vao tai nguyen he thong hien tai, giong nhu mot he thong tu hoc. Moi phien ban deu co muc tich cuu la lam tang toc do truy cap du lieu, nhung SysMain la toi uu nhat trong so do.
Cac cau hoi thuong gap ve SysMain
Nhieu nguoi dung thac mac rang SysMain co phai la tien trinh doc hai hay khong. Cay tra loi la khong, SysMain la dich vu chinh thong tu Microsoft va khong lien quan den virus hay phan mem doc. Tuy nhien, do no chay lien tuc, mot so phan mem diet virus co the canh bao neu thay no su dung nhieu RAM. Dieu nay binh thuong va ban khong can lo lang. Mot cau hoi khac la lie viec tat SysMain co anh huong den bao mat he thong khong. Cay tra loi cung la khong, vi dich vu nay chi lien quan den tien tai du lieu, khong lien quan den bao mat. Cuoi cung, nhieu ban thac mac co can khoi dong lai may sau khi tat Hay khong. Tot nhat la khoi dong lai de dam bao dich vu khong con phuc hoi ngam.
Tai sao SysMain lai su dung nhieu RAM?
Mot trong nhung phan hoi pho bien tu nguoi dung la SysMain chiem dung RAM qua nhieu. Dieu nay xay ra khi Windows du doan ban can nhieu ung dung. Vi du, neu ban thuong mo Photoshop, Word, Chrome va Excel cung luc, SysMain se tien tai ca bon vao RAM. Tren may tinh co 8 GB RAM, luong RAM bi chiem co the len den 1-2 GB. Neu ban thay toc do may tinh cham lai do RAM day, ban co the tam thoi tat SysMain. Tuy nhien, hay nho rang RAM duoc tao ra de su dung, va viec RAM trong khong mang lai loi ich gi. SysMain dung RAM de lam viec, khong phai de lang phi. Do do, dung luong RAM bi chiem khong la van de neu he thong van hoat dong tot.
Kiem tra hoat dong cua SysMain qua Task Manager
Ban co the xem SysMain hoat dong nhu the nao qua Task Manager. Nhan Ctrl + Shift + Esc de mo Task Manager, vao tab Processes, tim tien trinh Service Host: SysMain. Tai day, ban se thay phan tram su dung CPU, bo nho va o cung. Neu thay SysMain su dung CPU cao trong thoi gian dai, do co the la dau hieu cua loi. Trong truong hop do, ban hay thu khoi dong lai dich vu hoac cap nhat Windows de khac phuc. Thong thuong, SysMain chi su dung CPU o muc thap, duoi 2%, va bo nho tu 100-300 MB. Neu cao hon, ban co the tam tat no de giai quyet.
Anh huong cua SysMain den hieu nang choi game
Gioi choi game la nhung nguoi quan tam nhat den SysMain. Tren cac dien dan nhu Reddit, nhieu game thu cho rang tat SysMain giup tro choi muot hon. Ly do la khi SysMain chay ngam, no lien tuc doc ghi du lieu, gay xung dot voi viec nap cua game. Dieu nay dac biet ro rang khi RAM chi co 4-8 GB. Tuy nhien, neu ban co tu 16 GB RAM tro len, tac dong nay la khong dang ke. Mot so tu vien game nhu Blizzard va Valve khong dua ra khuyen cao cu the ve SysMain. Tot nhat, ban hay tu thu nghiem: choi game voi SysMain bat, ghi nhan FPS, sau do tat va so sanh. Neu thay cai thien, ban co the giu nguyen trang thai tat.
Nhung truong hop ko nen tat SysMain
Co nhung truong hop ban khong nen tat SysMain de tranh anh huong den he thong. Thu nhat, neu ban dung o cung HDD, viec tat se lam may tinh khoi dong cham va mo ung dung lau hon. Thu hai, neu ban thuong mo nhieu ung dung cung luc, SysMain giup can bang tai nguyen. Thu ba, neu ban la nguoi dung van phong, khong co nhu cau toi uu khe khac, de dich vu tu dong la tot nhat. Cuoi cung, neu ban khong gap su co gi ve hieu nang, dung lang phi thoi gian de tat SysMain, vi no duoc Microsoft toi uu cho he dieu hanh.
Tai nguyen va lien ket tham khao
De tim hieu them, ban co the tham khao trang chinh thuc cua Microsoft ve SysMain. Mot trong nhieu bai viet quan trong tren Microsoft Learn: What is SysMain and why does it sometimes use a bunch of RAM?. Trang nay giai thich chi tiet co che va ly do vi sao SysMain su dung RAM. Ngoai ra, ban cung co the xem bai viet cua Core Technologies de biet ve cach quan ly dich vu: SysMain - Windows Service. Cac trang nay cung cap thong tin tu cac chuyen gia va la nguon dang tin cay.
Tai lieu tham khao
Microsoft Learn. "What is SysMain and why does it sometimes use a bunch of RAM?" learn.microsoft.com/en-us/answers/questions/4134946/what-is-sysmain-and-why-does-it-sometimes-use-a-bu.
Core Technologies. "SysMain - Windows Service." coretechnologies.com/blog/windows-services/sysmain.
Win32 Extra. "Performance Optimization." win32extra.com/blog/performance-optimization.
Reddit r/computers. "Don't disable SysMain (previously known as SuperFetch)." reddit.com/r/computers/comments/c8iq9o/dont_disable_sysmain_previously_known_as.
Leak PT. "SysMain Windows 10." leak.pt/sysmain-windows-10.
