ORA-01652:无法通过128(在表空间space中)扩展temp段
当“space=用户表空间 ”时报错处理:
--查看表空间的大小;
SQL> SELECT TABLESPACE_NAME,SUM(BYTES)/1024/1024 MB FROM DBA_FREE_SPACE GROUP BY TABLESPACE_NAME;
--查看表空间中数据文件存放的路径:
SQL> SELECT TABLESPACE_NAME, BYTES/1024/1024 FILE_SIZE_MB, FILE_NAME FROM DBA_DATA_FILES;
--错误处理:附加表空间
--alter tablespace TESTSPACE add datafile 'D:\MYSPACE01.DBF' size 20480m
当“space=temp ”时报错处理:
临时表空间的作用:
临时表空间主要用途是在数据库进行排序运算[如创建索引、order by及group by、distinct、union/intersect/minus/、sort-merge及join、analyze命令]、管理索引[如创建索引、IMP进行数据导入]、访问视图等操作时提供临时的运算空间,当运算完成之后系统会自动清理。
当临时表空间不足时,表现为运算速度异常的慢,,并且临时表空间迅速增长到最大空间(扩展的极限),并且一般不会自动清理了。
如果临时表空间没有设置为自动扩展,则临时表空间不够时事务执行将会报ora-01652无法扩展临时段的错误,当然解决方法也很简单:1、设置临时数据文件自动扩展,或者2、增大临时表空间。
临时表空间的相关操作:
查询默认临时表空间:
SQL> select * from database_properties where property_name='DEFAULT_TEMP_TABLESPACE';
PROPERTY_NAME
------------------------------
PROPERTY_VALUE
--------------------------------------------------------------------------------
DESCRIPTION
--------------------------------------------------------------------------------
DEFAULT_TEMP_TABLESPACE
TEMP
Name of default temporary tablespace
查询临时表空间状态:
SQL> select tablespace_name,file_name,bytes/1024/1024 file_size,autoextensible from dba_temp_files;
TABLESPACE_NAME
------------------------------
FILE_NAME
--------------------------------------------------------------------------------
FILE_SIZE AUT
---------- ---
TEMP
/opt/Oracle/oradata/TEST/temp01.dbf
65 YES
查询临时表空间动态视图:
SQL> select * from v$tempfile;
FILE# CREATION_CHANGE# CREATION_TIM TS# RFILE# STATUS
---------- ---------------- ------------ ---------- ---------- -------
ENABLED BYTES BLOCKS CREATE_BYTES BLOCK_SIZE
---------- ---------- ---------- ------------ ----------
NAME
--------------------------------------------------------------------------------
1 446436 09-DEC-08 3 1 ONLINE
READ WRITE 68157440 8320 20971520 8192
/opt/oracle/oradata/TEST/temp01.dbf
扩展临时表空间:
方法一、增大临时文件大小:
SQL> alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' resize 100m;
Database altered.
方法二、将临时数据文件设为自动扩展:
SQL> alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' autoextend on next 5m maxsize unlimited;
扩展表空间时报错:
SQL> alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' resize 100m;
alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' resize 100m
*
ERROR at line 1:
ORA-00376: file 201 cannot be read at this time
ORA-01110: data file 201: '/opt/oracle/oradata/TEST/temp01.dbf'
SQL> alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' autoextend on next 5m maxsize unlimited;
alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' autoextend on next 5m maxsize unlimited
*
ERROR at line 1:
ORA-00376: file 201 cannot be read at this time
ORA-01110: data file 201: '/opt/oracle/oradata/TEST/temp01.dbf'
原因是临时表空间不知道什么原因offline了,修改为online后修改成功。
SQL> alter database tempfile '/opt/oracle/oradata/TEST/temp01.dbf' online;
Database altered.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters

MySQloffersechar, Varchar, text, Anddenumforstringdata.usecharforfixed-Lengthstrings, VarcharerForvariable-Length, text forlarger text, AndenumforenforcingdataAntegritywithaetofvalues.

Optimizing MySQLBLOB requests can be done through the following strategies: 1. Reduce the frequency of BLOB query, use independent requests or delay loading; 2. Select the appropriate BLOB type (such as TINYBLOB); 3. Separate the BLOB data into separate tables; 4. Compress the BLOB data at the application layer; 5. Index the BLOB metadata. These methods can effectively improve performance by combining monitoring, caching and data sharding in actual applications.

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Dreamweaver CS6
Visual web development tools

WebStorm Mac version
Useful JavaScript development tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
