Cov txheej txheem:
Video: Kuv yuav saib xyuas JVM heap li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
5 tsis yog li yooj yim txoj hauv kev los saib xyuas Heap Siv ntawm koj daim ntawv thov Java
- Siv Jconsole. Jconsole yog GUI uas tuaj yeem siv tau saib xyuas kev ua tau zoo metrics ntawm ib daim ntawv thov java.
- Siv VisualVM.
- Siv Jstat hais kom ua.
- Siv -verbose: gc hais kom ua kab xaiv.
- Siv JEE Application Server chaw.
Yog li ntawd, JVM nco npaum li cas?
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.
Tom qab, lo lus nug yog, Java profileing cov cuab yeej yog dab tsi? Java Profiler yog lub cuab yeej uas saib xyuas Java bytecode tsim thiab ua haujlwm ntawm JVM qib. Cov cai tsim thiab kev ua haujlwm no suav nrog cov khoom tsim, rov ua dua (nrog rau kev hu rov qab), txoj kev ua tiav, xov executions, thiab khib nyiab collections.
Tsis tas li ntawd, kev siv heap yog dab tsi?
Cov kev siv tshuaj kho mob tracker tuaj yeem siv los txheeb xyuas thiab ua kom zoo dua qhov kev khaws cov khib nyiab pob yog siv. Cov kev siv tshuaj kho mob tracker khaws cov cim cim ntawm txhua qhov piv txwv thiab seb qhov piv txwv puas tau faib rau hauv cov khoom loj pob.
Koj ntsuas kev ua tau zoo ntawm Java daim ntawv thov li cas?
Load xeem cov cuab yeej thiab Kev ua haujlwm zoo Kev tswj hwm (APM) cov kev daws teeb meem feem ntau yog siv los taug qab thiab ua kom zoo dua kev ua haujlwm ntawm Java applications . Khiav load xeem nyob ib ncig ntawm txawv daim ntawv thov Cov xwm txheej thiab ib txhij saib xyuas CPU, IO, kev siv Heap, thiab lwm yam. siv cov cuab yeej APM yog qhov tseem ceeb rau kev txheeb xyuas cov fwj.
Pom zoo:
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