Cov txheej txheem:
Video: JVM siv lub cim xeeb npaum li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov JVM muaj nco tsis yog lub heap, hu ua Non-Heap Nco . Nws yog tsim nyob rau hauv JVM startup thiab khw muag khoom ib-chav kawm ntawv xws li runtime tas li pas dej ua ke, teb thiab txoj kev cov ntaub ntawv, thiab cov cai rau txoj kev thiab constructors, raws li zoo raws li interned Strings. Lub neej ntawd siab tshaj qhov loj ntawm tsis-heap nco yog 64 MB.
Cov lus nug tseem yog, JVM siv RAM ntau npaum li cas?
Cov JVM muaj qhov teeb tsa default ntawm 1/4 ntawm lub ntsiab nco . Yog tias koj muaj 4 GB nws yuav ua rau 1 GB. Nco tseg: qhov no yog qhov zoo nkauj me me thiab koj tau txais qee cov khoom siv thiab cov xov tooj uas qhov no nco ntau.
Ib tug kuj yuav nug, JVM nco yog dab tsi? Cov JVM nco muaj cov ntu nram qab no: Heap Nco , uas yog qhov cia rau Java khoom. Tsis- Heap Nco , uas yog siv los ntawm Java los khaws cov chav kawm loaded thiab lwm cov ntaub ntawv meta. JVM code nws tus kheej, JVM cov qauv sab hauv, loaded profiler tus neeg sawv cev code thiab cov ntaub ntawv, thiab lwm yam.
Tom qab ntawd, lo lus nug yog, nco npaum li cas siv Java xov?
Nco ntsoov siv xov thiab pawg loj. Lub neej ntawd kev xaiv -Xss512k txhais tau tias txhua xov yuav siv 512kb ua nco . Lub JVM default yam tsis muaj qhov kev xaiv no yog 1MB.
Kuv yuav txheeb xyuas kuv qhov kev siv Java li cas?
5 tsis yog li yooj yim txoj hauv kev los saib xyuas Heap Siv ntawm koj daim ntawv thov Java
- Kev siv Memory los ntawm 'txheej txheem' qhia los ntawm kev ua haujlwm cov lus txib xws li sab saum toj (unix) lossis Task Manager (Windows) tsis yog java heap siv.
- java -Xmx1024m.
- Siv Jconsole.
- Siv VisualVM.
- Siv Jstat hais kom ua.
- Siv -verbose: gc hais kom ua kab xaiv.
Pom zoo:
Lub cim xeeb tseem ceeb thiab lub cim xeeb thib ob yog dab tsi muab piv txwv?
Lub cim xeeb thib ob muaj nyob rau hauv ntau thiab ib txwm loj dua lub cim xeeb thawj. Lub khoos phis tawj tuaj yeem ua haujlwm yam tsis muaj lub cim xeeb thib ob raws li nws lub cim xeeb sab nraud. Cov piv txwv ntawm lub cim xeeb thib ob yog lub hard disk, floppy disk, CD, DVD, thiab lwm yam
Lub cim xeeb npaum li cas siv SQLite?
Kev Siv Memory Los ntawm lub neej ntawd, peb SQLite wrapper siv max ntawm 2MB nco cache ib qho kev sib txuas
Kuv yuav tsum muaj lub cim xeeb dawb npaum li cas?
15% Txoj Cai ntawm Thumb rau Mechanical HardDrives Koj feem ntau yuav pom cov lus pom zoo uas koj yuav tsum tawm 15% mus rau 20% ntawm lub tsav khoob. Tias yog vim li cas, ib txwm ua, koj xav tau tsawg kawg 15% qhov chaw dawb ntawm lub driveso Windows tuaj yeem defragment nws
Kuv yuav faib ntau lub cim xeeb rau JVM li cas?
Txhawm rau nce JVM nco faib thiab xov pawg loj hauv Tomcat teeb tsa cov cuab yeej (Windows) Xaiv Pib> Txhua Qhov Kev Pabcuam> Apache Tomcat> Kho Tomcat. Nyem rau Java tab. Nkag mus rau cov lus pom zoo hauv qab no: Lub cim xeeb pib - 1024 MB. Nyem qhov General tab. Nyem Pib. Nyem OK
Koj qhib lub tsev qiv ntawv cim thiab siv lub cim li cas?
Qhib cov tsev qiv ntawv cim npe Xaiv Qhov rai> Cov Tsev qiv ntawv cim cim> [symbol]. Xaiv Qhib Symbol Library nyob rau hauv cov ntawv qhia zaub mov Symbols vaj huam sib luag, thiab xaiv ib lub tsev qiv ntawv los ntawm cov npe uas tshwm. Nyem rau ntawm Cov Ntawv Qhia Cov Ntawv Qhia Ntawv Cim rau ntawm lub vaj huam sib luag Symbols, thiab xaiv lub tsev qiv ntawv los ntawm cov npe uas tshwm