1 、参数文件及mysql参数
查看mysql 的 my.cnf 配置文件位置命令：>./bin/mysql --help | grep my.cnf
查看mysql 的参数设置命令： mysql > show variables --显示所有参数; // show variables like 'log_error%' 显示某匹配参数
mysql > select @@session.read_buffer_size; 查看当前session的read_buffer_size
mysql > select @@global.read_buffer_size; 查看全局的read_buffer_size
mysql > set @@session.read_buffer_size=1024000; 设置当前session的read_buffer_size
mysql > set @@session.read_buffer_size=1024000; 设置当前session的read_buffer_size
2、日志文件
MySQL BLOB : are there any limits?May 08, 2025 am 12:22 AMMySQLBLOBshavelimits:TINYBLOB(255bytes),BLOB(65,535bytes),MEDIUMBLOB(16,777,215bytes),andLONGBLOB(4,294,967,295bytes).TouseBLOBseffectively:1)ConsiderperformanceimpactsandstorelargeBLOBsexternally;2)Managebackupsandreplicationcarefully;3)Usepathsinst
MySQL : What are the best tools to automate users creation?May 08, 2025 am 12:22 AMThe best tools and technologies for automating the creation of users in MySQL include: 1. MySQLWorkbench, suitable for small to medium-sized environments, easy to use but high resource consumption; 2. Ansible, suitable for multi-server environments, simple but steep learning curve; 3. Custom Python scripts, flexible but need to ensure script security; 4. Puppet and Chef, suitable for large-scale environments, complex but scalable. Scale, learning curve and integration needs should be considered when choosing.
MySQL: Can I search inside a blob?May 08, 2025 am 12:20 AMYes,youcansearchinsideaBLOBinMySQLusingspecifictechniques.1)ConverttheBLOBtoaUTF-8stringwithCONVERTfunctionandsearchusingLIKE.2)ForcompressedBLOBs,useUNCOMPRESSbeforeconversion.3)Considerperformanceimpactsanddataencoding.4)Forcomplexdata,externalproc
MySQL String Data Types: A Comprehensive GuideMay 08, 2025 am 12:14 AMMySQLoffersvariousstringdatatypes:1)CHARforfixed-lengthstrings,idealforconsistentlengthdatalikecountrycodes;2)VARCHARforvariable-lengthstrings,suitableforfieldslikenames;3)TEXTtypesforlargertext,goodforblogpostsbutcanimpactperformance;4)BINARYandVARB
Mastering MySQL BLOBs: A Step-by-Step TutorialMay 08, 2025 am 12:01 AMTomasterMySQLBLOBs,followthesesteps:1)ChoosetheappropriateBLOBtype(TINYBLOB,BLOB,MEDIUMBLOB,LONGBLOB)basedondatasize.2)InsertdatausingLOAD_FILEforefficiency.3)Storefilereferencesinsteadoffilestoimproveperformance.4)UseDUMPFILEtoretrieveandsaveBLOBsco
BLOB Data Type in MySQL: A Detailed Overview for DevelopersMay 07, 2025 pm 05:41 PMBlobdatatypesinmysqlareusedforvoringLargebinarydatalikeImagesoraudio.1) Useblobtypes (tinyblobtolongblob) Basedondatasizeneeds. 2) Storeblobsin Perplate Petooptimize Performance.3) ConsidersxterNal Storage Forel Blob Romana DatabasesizerIndimprovebackupupe
How to Add Users to MySQL from the Command LineMay 07, 2025 pm 05:01 PMToadduserstoMySQLfromthecommandline,loginasroot,thenuseCREATEUSER'username'@'host'IDENTIFIEDBY'password';tocreateanewuser.GrantpermissionswithGRANTALLPRIVILEGESONdatabase.*TO'username'@'host';anduseFLUSHPRIVILEGES;toapplychanges.Alwaysusestrongpasswo
What Are the Different String Data Types in MySQL? A Detailed OverviewMay 07, 2025 pm 03:33 PMMySQLofferseightstringdatatypes:CHAR,VARCHAR,BINARY,VARBINARY,BLOB,TEXT,ENUM,andSET.1)CHARisfixed-length,idealforconsistentdatalikecountrycodes.2)VARCHARisvariable-length,efficientforvaryingdatalikenames.3)BINARYandVARBINARYstorebinarydata,similartoC
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