performance. Because the transaction log is a continuous disk write process, no read action occurs. Therefore, putting the log file on a separate disk has a certain effect on optimizing performance.
Another optimization measure relates to the volume of the log
Tags: DBCC article BSP color size ASE file detail supportSQL Server log file too large log file cleanup method, the network provides a lot of separate database--〉 delete log files-〉 Additional database method, this method is too r
DATABASE clear logfile Group 1;alter database clear logfile Group 1*error at line 1:ora-00350:l OG 1 of instance ORCL (thread 1) needs to be archivedora-00312:online log 1 thread 1: '/u01/app/oracle/oradata/orcl/redo0 1.log ' sql> ALTER DATABASE clear unarchived logfile group 1;database altered. Sql> select * from
1. AWR report for the first 7 days of 2018-09-26 (Oracle usage is 4,022.34/6,179.76/24=2.71% during this period)The most notable problem is the log file sync wait event, which is accompanied by the log file parallel write wait event, which is also relatively high, initially judging this database operating system I/O us
performance. Because the transaction log is a continuous disk write process, no read action occurs. Therefore, putting the log file on a separate disk has a certain effect on optimizing performance.
Another optimization measure relates to the volume of the log
The ORA-00354 caused by a read-only rhel5.8 File System: upt redo log block header,
An rhel5.8 file system read-only caused by ORA-00354: upt redo log block header
Wed Jun 03 03:31:24 CST 2015 Thread 1 advanced to
SQL 2008 log Files account for 23G of hard disk space, and the transaction log has been truncated (Truncate), the actual log content is small, 1G is not, want to release the extra space occupied by the log files.
However, no matter how you shrink (Shrink)
Simple REDO file corruption error ORA-00333 REDO log read Block ErrorI. fault description
First, the REDO file required for instance recovery is damaged.
Ii. solution 1. Use the following CLEAR command for non-current REDO or current REDO but no active transactions:
Use the CLEAR command to recreate the
specified format is 'delimited', the default value is comma (,), which is stored in the registry. you can modify HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ jet \ 4.0 \ engines \ Text \ format to change the default setting.Do not modify the registry at will. this Ms provides another optional method: provide us a schema. INI file. if we read a fixed-length file,
Tags: json object writing snippet Python2 SEL connect AST program APE Conversion Preface: Recently help senior to deal with JSON file, need to read into the database, in case it might read data from the database. The data is about the Yelp site: https://github.com/Yelp/dataset-examples,http://www.yelp.com/dataset_challenge/. involves some JSON and
RECOVERY full with no_wait GO ALTER database dnname SET RECOVERY full--Also The original full mode GO SQL2005 Empty Delete log: Backup Log dnname with No_log ' Here's dnname is the name of the database you want to shrink, and I'm not going to comment anymore by changing the database name below.
go
dump Transaction dnname with no_log
go use
dnname
DBCC shrinkfile (2)
go sqlserver2000 Compression LogYou can
Write log files on a single server, whenever the log file is written to a certain size, such as 1G, the log file will be renamed to another name, and a new log file with the same
I. fault description
First, the redo file required for instance recovery is damaged.
Ii. Solution
1. Use the following clear command for non-current Redo or current redo but no active transactions:
Use the clear command to recreate the log file SQL> alter database clear logfile group 3;
If the
Tags: run backup file management clears CTI Trunc set DBCC SQL2008 's shrink log due to SQL2008 's optimization of file and log management, the following statements can be run in SQL2005 but have been canceled in SQL2008: (SQL2005) Backuplog dnname withno_logGo
Dump TransactionDnname withno_logGo
UseDnnameDBCCShrinkfi
successful repair ( turn off other query windows if an error occurs )
ALTER DATABASE Bigdata_testinfo set Multi_userYou refresh the database and you find out, okay ~
Scared to the point, quickly check the data there is no problem (formerly)
The size of the wood is also changed
Expand:
Someone attached to the time found ... Tips for rejecting xxx
Uh.. is actually not open permission:
Leave the current user's permission open and OK.
If y
No more nonsense, straight into the subject: The code is as follows:
1. Read log or txt text information
/*** Read log or txt information** @param FilePath* @return*/Public listlist
try { fileinputstream is = new FileInputStream (filePath); inputstreamreader ISR = new InputStreamReader (IS); bufferedreader br = new
Simple log Positioning system----Read EXE execution file path in the specified format of the file content, according to the LOG keyword output specified results, to achieve simple problem positioningThe steps are simple:1, clock () function, used for timing, see performance
The passwd command does not have any permission to read the shadow file. Why can common users log on normally? we can see that the password file does not have any permission. users need to read the password file during logon, if i
The log file is larger, with 2 more than one G. There is no way to use file operations, only read by rows.
Set_time_limit (0);
@ini_set (' Memory_limit ', ' 64M ');
$conn = mysql_pconnect (' localhost ', ' hcq ', ' hcq ') or Die ("con\ ' t connection db.");
mysql_select_db ('
The passwd command does not have any permission to read the shadow file. Why can common users log on normally? We can see that the password file does not have any permission. users need to read the password file during logon, if i
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.