Index reorganization yog txheej txheem uas SQL Server mus dhau qhov ntsuas uas twb muaj lawm thiab ntxuav nws. Index rebuild yog txheej txheem hnyav qhov twg qhov Performance index raug tshem tawm thiab tom qab ntawd rov tsim dua los ntawm kos nrog cov qauv tshiab, pub dawb los ntawm tag nrho cov khoom seem thiab cov nplooj ntawv khoob.
Dab tsi yog qhov txawv ntawm Rebuild index thiab reorganize hauv SQL Server?
Rebuild: rebuild poob qhov ntsuas uas twb muaj lawm thiab rov tsim dua. Reorganize: reorganize lub cev npaj cov nplooj ntawm qhov ntsuas. Yog tias index fragmentation qhia saum toj no 40%.
Kuv puas yuav tsim kho lossis rov txhim kho qhov ntsuas?
Ib qho kev ntsuas rov tsim kho yuav ib txwm tsim qhov ntsuas tshiab, txawm tias tsis muaj kev tawg. … Qhov no txhais tau hais tias rau qhov ntsuas me me (piv txwv li tsawg dua 30% fragmentation), nws feem ntau nrawm dua los kho qhov ntsuas, tab sis rau qhov ntsuas hnyav dua, nws feem ntau nrawm dua kom rov tsim qhov ntsuas.
Dab tsi yog rov tsim kho qhov Performance index?
Rebuilding an index txhais tau tias deleting the old index hloov nws nrog tus tshiab index. Ua ib qho kev ntsuas rov tsim dua tshem tawm cov kev sib cais, ua kom cov nplooj ntawv raws li qhov uas twb muaj lawm sau qhov teeb tsa kom rov qab tau qhov chaw khaws cia, thiab tseem rov txiav txim cov kab ntsuas hauv cov nplooj ntawv sib txuas.
Puas rov tsim qhov ntsuas tsim nyog?
Txhua zaus, peb xav tau rov tsim kho qhov ntsuas hauv Oracle, vim tiasindexes ua fragmented lub sij hawm. Qhov no ua rau lawv cov kev ua tau zoo - thiab los ntawm kev txuas ntxiv - uas ntawm koj cov lus nug database, kom degrade. … Tau hais tias, indexes yuav tsum tsis txhob rebuilt mus rau ntau zaus, vim hais tias nws yog ib tug muaj peev xwm ua hauj lwm hnyav.
