toanalyzelinuxcoredumps, FirstEnableCoredumpSusingUlimit-cunlimitedandConfigure/etc/ecrict/limits.confand/proc/sys/kernel/core_patterntosetthesizelimitandfileNaming ??;
Aug 06, 2025 pm 04:48 PM?? ???? ProjectLoom? ?????. JVM? ???? ??? ???? ?? I/O ??? ?? ????? ??? ??? ?? ??????. 1. ?? ???? JVM? ?? ???? ??? ?? ?? ????? ???? ??? ? ??? ??? ? ???? ?? ??? ??? ? ????. 2. Executors.newvirtualthreadperTaskexEcutor ()? ???? ???? ?? ? ??? ?? ?? ???? ????. 3. ???? ? ?????? ??? ?? I/O ?? ????? ??? CPU ??? ? ??? ?? ??????. 4. ?? ??? ??? ??? ???? ??? ??? ?? ???? ?????? ???? ? ??? ??? ???? ???? ???????. 5. ??? ??? ???? ?? ??? ?? ? ? ?? ????? ????.
Aug 06, 2025 pm 04:46 PMSNICRINGKECHANGESLIKEREMOVOLOFINTERNALAPIS, ??, ?? ???, ?? ???, ?? ?? ?? ? NewLangueConstructs
Aug 06, 2025 pm 04:45 PMusearray_mapwhenyouneedanewarraywithtransformedValues, asitreturnsanewarray withoutwhithogin .2
Aug 06, 2025 pm 04:42 PMaudejpaforportabilitybutleveragehibernate-specificfeatures batching and caching and caching and caching and caching whengeed;
Aug 06, 2025 pm 04:38 PMsuperglobalsinphparepredefined, ?? AvailablevariablevariablethatholddatafromuserInput, Serverenvironment, Sessions ? More, AccessibleInallScopes
Aug 06, 2025 pm 04:36 PM?? ?? ??? ?? ???? ??? ?? ??? ?????, ?? ?? ??, ?????? ?? ? ??? ??? ?? ???? ???? ?????. 2. ?? ? ?? ??? ????? ???? ??? ?? ????? ?? ??? ???? ?? ????? ? ???? ?? ??? ?? ??? ???? ?? ?????. 3. Richter ?? ??? ?? ???? ?? ???? ?? ??? ???? ?? ??? ??? ??? ?? ?? ???? ?? ? ? ??????. 4. ????? ?? ??? ?????? ?? ?? ?????? ????? ??? ??? ?? ?????? ???, ??? ? ?? ??? ?? ?????? ??????? ?? ?????. 5. ??? ?? ??? ???? ????? ???? ??????, ?? ??? ??? ?????? ?? ??? ???? ???? ??? ? ?? ??? ?????. ??? ??? ???? Java ??? ??? ?? ? ? ????.
Aug 06, 2025 pm 04:35 PM???? withInswitchStatementWithIntSwitch
Aug 06, 2025 pm 04:33 PM?? ? ?????? ?? Java ??? ???? ?? ??? ? ?? ?? ?? ????? ?????. 1. SpringWebflux? Projectreactor? ???? ? ??? ?? ? ?????? ????, ?? ?? ? ??????? ??? I/O ??? ? ?? ?? ?? ?? ????? ?????. 2. ?? ?? ?? ? ???? ?? 0-1 ? 0-N ??? ??? ??? ???? ?????. ?? ?? MAP, FlatMap, OnErrorResume ?? ?? ???? ??? ???? ???? ???? ? ?????. 3. ??? ???? ??? ?? ??? ??? ?? ?? ?? ?? ??? ?? ????? ?? ???????. 4. ?? ????? ?? ?? ??? ??????.
Aug 06, 2025 pm 04:31 PM$ _session ? $ _cookie? PHP?? ? ?????? ?? ??? ?????? ?? ???????. 1. $ _session? ??? ?? ??? ???? ???? ??? ??? ???? ?? ?? ? ?? ID (????? phpsSessid?? ??? ??)? ?????. ??? ??? ?? ???? ?? SESSION_START () ??? ?????. 2. $ _cookie? ????? ?? ??? ???? ???? ??? ??, ??? ?? ?? ?? ??? ?? ???? ? ??? ? ????. 3. ?? ???? ?? ?? ??? ???? ?? ??? ? ? SESSION_REGENEREATE_ID (TRUE) ??? ?????.
Aug 06, 2025 pm 04:29 PMNeverTrust $ \ _ Server \ [ 'http \ _host'\] validation, asitcanbespoofedtoenableopenredirect; aconfiguredbaseurl.2.donotrelysolelyon $ \ _ server [ 'remote \ _addr'] forclientipdetection, asitmayreflectaproxyip;
Aug 06, 2025 pm 04:27 PMAlwaysCheckarrayBoundSusingIsset () orarray_key_exists () beforeaccesseLementStoPreventUndEdeffineFortErrors.2.usearray_key_exists () missingKysandNUldValuesIssurecesturecturecturecturecturecturecturecturecturecture, ??
Aug 06, 2025 pm 04:25 PMJavacollectionsFramework? ??? ? ?? ?? ???????? : List, Set ? Map. 1. ??? ?? ?? ??? ?????. ???? ???? ArrayList (Rail Access Fast) ? LinkedList (??? ?? ? ??)? ?????. 2. ??? ???? ?? ?? ? ??? ???? ?? ??? ??? ??? LinkedHashset? ?? ??? ???? TreeSet? ??? ?????. 3.?? ?? ?-? ?, Hashmap? ???? ??? ??? NULL? ?????. LinkedHashMap? ?? ??, ?? ? ??? ?, ?? ??? ???-????? ?????. ??? ??? ?? ?? ? ?? ????? ???????.
Aug 06, 2025 pm 04:24 PM/bin ? /sbin ??? ?? ?? ? ??? ?? ??; 2./USR ?? ??? ???? ? ?? ???; 3./etc? ?? ?? ???????. 4./var? ?? ? ??? ?? ?? ???? ?????. 5./home ? /root? ?? ??? ? ?? ???? ? ???????. 6./tmp ? /run? ?? ?? ? ??? ???? ?????. 7./dev, /proc, /sys? ?? ? ??? ?? ?????? ?????. 8./lib ? /lib64?? ??? ??? ??? ????? ??? ???? ????. 9./opt ? /srv? ?? ?? ????? ? ??? ???? ?????. FHS? ??? ? ???? ??? ?? ??? ?? ???? ???? Linux ??? ????? ???? ????? ???? ?? ??? ?? ???? ?????.
Aug 06, 2025 pm 04:23 PMjavaflightrecorder (jfr) ? javamissioncontrol (jmc) arebuilt-injdktoolsforprofingjavaapplicationswithminimaloverhead.1.jfrcollectSruntimedatasuchasgarbageCollection, ThreadContention, cpuusage, ?? ?? ? jvmevents.enablejprateTupUteT-stx :
Aug 06, 2025 pm 04:14 PMworker_processes? CPU ?? ?? ???? ???? ?? ?? ?? ?? worker_connections? ???? ULIMIT-N? ? ?? ??? ????. 2. Linux?? Epoll ? Multi_accept? ????? I/O ??? ??????. 3. ??? I/O? ???? ?? ???? Open_File_Cache? ??????. 4. ??? ???? ??? ?? ?? ??? ????? ???? ??? ????? ?? proxy_buffer ?? ??? ??????. 5. GZIP? ??? ?? ???? ???? ?? ?? ? ?? ? ???? ?? ??????. 6. HTTP/2? SSL ?????? ????? ??? ???? ?? ? ??????. 7. AB ?? WRK? ??????
Aug 06, 2025 pm 04:06 PMinstallinxusingTheAppropriatePackagemanagerForylinuxDiptribution, startAndenAbleService, andverify infitisRunning.2.configUreThePireWalltoHttTpandhttTptPfficUsinguingworwald.3
Aug 06, 2025 pm 04:02 PMarray_splice()istheprecisetoolforremovingspecificelementsfromanarrayinPHP.1.Itmodifiestheoriginalarraybyremovingaspecifiedportionandreturnstheremovedelements.2.Usearray_splice($arr,$offset,$length)toremove$lengthelementsstartingat$offset.3.Removingfr
Aug 06, 2025 pm 03:59 PMXSTATEMAKESMANIGING ComplexUistateInjavaScriptCracticalByUsingFinitesTeMachinesandStateCharts.insteadOfScatherdBooleleanslikeIsLoadingOrisError, ItCentralizesLogicIntodeFinedStatesandtates ? aformc
Aug 06, 2025 pm 03:52 PMwhen when whenwithgeospatialdatainmysql, performancanquicklybecomeabottleneckthifthingsaren'tsetupright
Aug 06, 2025 pm 03:45 PMCorewebvitalscanbeimprovedByoptimizinglcp, fid ? clsthroughspecificstrategies : 1. improvelcpbyoptimizingserverresponsetime, preloadingcriticalresources, compressingimages, andusingefficefiedbbs.20
Aug 06, 2025 pm 03:37 PMPHP ??? ?? ???? ??? ?? ??? ???? ?? ?? ??? ??? ??? ???? ???? ?????. ?? ?? ?? ??? ?? ???? ?? ????, ?? ?? ?? ??? ??? ?? ??? ??? ???? ?? ????? ?????. 1. ?? ?? ???? ??? ?? ???? ?? ??? ???? ?? ? ? ????. 2. handlePostState ()? ?? ?? ?? ??? ??????? ?? ? ??? ?? ? ? ????. 3. ??? ??? ???? ???? ?? ? ????? ??? ??? ??????. 4. ?? ??? ??? ?? ?? ?? ???? ?? ??? ???? ?? ????. 5. ??? ??? ????? ??? ??? ?? ??? ? ?? ?? Symfo? ?? ?? ?????? ???????.
Aug 06, 2025 pm 03:26 PM?? ??? ? Corosync? ???? ?? ??? ??? Linux ????? ???? ?? ?? ?? ??? ???????. ??? ??? ??, ?? IP ? ??? ??, ?? ?? ??????? SSH, ?? ???? (??) ? ??? ??? ??? ???? ? ?? ??; 2. ? ??? ?? ????? ???? ?????? (RHEL/CENTOS ?? DNFININSTALLPACEMAKERPCS ? UBUNTU? APTINSTALLPACEMAKERCOROSYNCCCCRMSH? ???? PCSD ???? ????? HACLUST ????? ??? ????? ?????. 3. ?? ???? ??? ???? (pcsclusterauthnode1node2) ??? ????.
Aug 06, 2025 pm 03:22 PMMySQL 8.0? InvisibleIndexes? ???? ???? ?? ???? ??? ?? ? ????. 1. ?? ? ? ??? ?? ?? : CreateIndex ... Invisible; 2. ?? ???? ??? ?? ??? ?????? : AlterIndex ... Invisible; 3. ??? ?????? : AlterIndex ... ??. ??? ?? ??? ??? ????? ?? ?? ???? ???? ????. ??? ???? ??? ????? ?? ??? ??? ??? ??? ? ?????. ?? ? ??? ?? ??? ???? ForceIndex? ??? ??? ??? ???? ??? ??? ??? ? ?? ?? ? ??? ?? ??? ?????.
Aug 06, 2025 pm 03:20 PMTomigrateOlderApplicationSql8.0successly, firstCheckapplicationCompatibility, thenceRiledIndConvertData, UpdateConFigurationAndSecuritySettings ? MonitorPerformancePost-Migration.1.CheckApplicationCompatibility? ?? DatabAdernIrsupdatedDatabAdernIrs
Aug 06, 2025 pm 03:07 PMUSEARRAY_SPLICEFORIN-INSERTIONASITMODIFIESTHEORRAYDIRECTILY, ismoreferficient, andhassimplersyntax; 2.usearray_mergewithArray_slice wherepresergingHearnArrayIsRequired, asitCreateSanewArrayWithoutWithoutWithoutalSty
Aug 06, 2025 pm 03:06 PMQuarkusiSakubernetes-nativeJavaframeworkstartup, lowmemoryusage ? seamlesscontainerintegration .1.itsupportslivecodingwithinstreloadvia./mvnwquarkus : dev.2.itaunifificationconfigurationmodphoughoupppl
Aug 06, 2025 pm 03:01 PMwhenullcoalescingoperator (??) inphpsafelyaccessesarraykeyswithtriggeringnotices.1.itreturnsthevalueifthekeyexistsandisnotnull; ??? ???, itreturnsadefault.2.itsimplifiesfalllogiccomparedtoisset () andlenaryChecks.
Aug 06, 2025 pm 02:48 PM?? $ \ _ serverValuesAsUntrustediftheyCanCannfluencedByUserInput, suchashttp \ _host, request \ _uri, http \ _user \ _agent, http \ _referer , andQuery \ _string, sincethesecanbemanipulatedByclients.2.alwayseScape $ \ _ ServerDataUsingHtmlSpecialchars ($ \ _ Server [ 'value'], Ent
Aug 06, 2025 pm 02:45 PMDestructuringAllowsTectiveExtractionOfArrayElementsIntOvariables.2.thefind () MethodRetReievestHevErieVeStelementMatchingAcondition, whilefindIndex () ReturnsIndex, ? ? FofferingsAferandmoreReadableAltivesto
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