';at this point the execution of the planned cardinality=14300 , and what is the actual number of records returned? Clearly, it is not the 14300 of the implementation plan . Now let's make the query larger and set the rectangle with a latitude span of 2 as the search condition.explain plan for SELECT * from DLTB20150705 where Mdsys. Sdo_anyinteract (Shape, Sdo_geometry (2003,4610,null,sdo_elem_info_array (1,1003,3), Sdo_ordinate_array (116,32,11 8, 34))) = ' TRUE ';now our query scope is ge
The real reason why Oracle instances are weird down1, monitoring colleagues saidOracleThe test Library also automatically Downup. I login check to see that there is no Oracle background process running, the Oracle instance is actually shut down, immediately to start it.
# failed to start Sql> startup; ORACLE instance started. Total System Global area 1603411968 bytes Fixed size 2213776 bytes Variable size 989857904 Bytes Database buffers 603979776 bytes Redo
Label:Once a 12C RAC database is installed on rhel7.2, one of the DB instances is often automatically crash. Viewing the alert log found the following error message: Errors in FILE/D12/APP/ORACLE/DIAG/RDBMS/RAC12C/RAC12C2/TRACE/RAC12C2_J000_21047.TRC:
ora-27157:os post/wait Facility removed
Ora-27300:os system dependent Operation:semop failed with status:43
ora-27301:os failure Messa Ge:identifier removed
ora-27302:failure occurred at:sskgpwwait1
Fri
ORA-19809/ORA-19809: limit exceeded for recovery files problem processing today encountered this problem, alert Log error information is as follows: in fact, the problem is very simple, put the archive fra space is full, as a result, the archive fails, and oracle suspends. Note that db_recovery_file_dest is only a logical limitation. The fra directory may have space left, but oracle will not be used. Pay more attention to fra usage. You can use v $ flash_recovery_area_usage to view fra usage. So
the ADRCI utility, you can also view the name of the trace file in the ADR and delete warning logs with and without the XML tag.
You can also use V $ DIAG_INFO to list important ADR locations.
Use the tree Command to view the directory structure:
[18:11 oracle @ dave/u01/app/oracle/diag] $ tree
.
| -- Asm
| -- Clients
| -- Crs
| -- Diagtool
| -- Lsnrctl
| -- Netcman
| -- Ofm
| -- Rdbms
| '-- Dave
| -- Dave
| -- Alert
| '-- Log. xml
| -- Cdump
| -- Core_16650
| -- Core_18804
| '-- Core_60
directory. And displays the process information to open the directory or file. Lsof director/filenamelsof/data/logs/jboss/cbsysApp01a/server. log ########## linux does not release space after deleting files ################# a server is found today the home space is full, so I want to clear useless files. when I delete the files, I find that the available space has not changed OS: centos4.7: I found the current disk space usage: [root @ ticketb ~] # Df-hFilesystem Size Used Avail Use % Mounted
contains multiple structural changes (for example, adding a tablespace, changing the tablespace or data file status, adding a new online redo log, and renaming a file ), RMAN performs automatic backup of the control file only once. In 11gR2, the control file is automatically backed up by the MMON slave process within several minutes after the structure change, which improves performance. Therefore, it is normal to obtain the automatic backup of control files after several minutes of structural
/shvdb1/trace/shvdb1_ora_9240854.trc (incident = 48601 ):ORA-00600: internal error code, arguments: [kssadd: null parent], [], [], [], [], [], [], [], [], [], []Incident details in:/space/sys_software/oracle/app/diag/rdbms/shvdb/shvdb1/incident/incdir_48601/shvdb1_ora_9240854_i48601.trcUse ADRCI or Support Workbench to package the incident.See Note 411.1 at My Oracle Support for error and packaging details.Fri Nov 30 18:02:44 2012Dumping diagnostic da
@ localhost ~] $. Bash_profile
7. View System Environment Variables
The effect is always effective.
8. Go to $ ORACLE_HOME/dbs to view the directories with orcl.
9. Change the file name orcr =, nihao, ORCL =, and NIHAO. The command is as follows:
10. Generate and view the password file again.
11. log on to the database and view the Instance name. The result shows that the sid has changed from orcl to nihao.
You do not need to log out. Start the second part and change the database name dbname.
as DBWR, LGWR, and SMON. The background trace file is generated based on the running status of the background process. The background trace file is also saved in the directory specified by the BACKGROUND_DUMP_DEST parameter. The file format is siddbwr. trc and sidsmon. trc. Another type is the user trace file generated by the user process connected to Oracle. These files are generated only when errors occu
authors where au_lname = 'white' select * from authors where au_lname = 'green' select * from authors where au_lname = 'carson' after standardization, the preceding statement looks like this: select * from authors where au_lname = {str}
With standardized statements, it is no longer difficult to calculate the access mode of the database system. When running Read80trace, I usually use the following command line:
Read80trace –f –dmydb –Imytrace.trc
The-F switch does not genera
/oradata/bys3/system01.dbf
At this time, ll/proc/10986/fd will still display the File status as :( deleted). If the file is not a SYSTEM file, it will become normal after online RECOVER.
####################
SYS @ bys3> conn bys/bys
Connected.
BYS @ bys3> select TABLESPACE_NAME, STATUS, ONLINE_STATUS from dba_data_files;
TABLESPACE_NAME status online _
----------------------------------------------
SYSTEM AVAILABLE SYSTEM
SYSAUX AVAILABLE ONLINE
UNDOTBS1 AVAILABLE ONLINE
USERS AVAILABLE ONLINE
ORA-01843 and NLS_DATE_FORMAT Problem Analysis in Oracle SQL where clause input character type parameter '19-November-08 ', so that you can directly compare with the date type, or convert the same date type comparison. Www.2cto.com if the input character format is the same as NSL_DATE_FORMAT, you can directly use it without conversion, otherwise the ORA-01861 error will be reported. If the conversion is incorrect, A ORA-01843 or other error may be reported. Example:
forever, level 12'; execute the following SQL statement: SQL code select * from t where owner = 'Scott 'and object_type = 'table' and object_nam E = 'emp'; select * from all_objects where owner = 'Scott 'and object_type = 'table' and object_name = 'emp'; view the performance log location recorded by TKPROF: SQL code select rtrim (c. value, '\') | '\' | d. instance_name | '_ ora _' | ltrim (to_char (. spid) | '. trc 'from v $ process a, v $ session B,
background trace file is also saved in the directory specified by the BACKGROUND_DUMP_DEST parameter. The file format is siddbwr. trc and sidsmon. trc. Another type is the user trace file generated by the user process connected to Oracle.
These files are generated only when errors occur during user sessions. In addition, you can generate this type of file by executing an oracle tracking event. The User tra
1,A VANET Routing basedon the Rea l time Road Vehicle Density in the city environment, Hyun Yu, Joo n Yoo, Sanghyun Ahn. Icufn.In this vanet routing protocol, each vehicle uses beacon information and road imformation table to calculate the real-time vehicle density information for a particular route. Based on real-time vehicle density information, each vehicle can establish a reliable route for packet delivery. Specifically, each vehicle periodically sends a beacons packet, and the beacons inclu
How to Use the TKPROF command in oracle to view Tracefile
Trace file is a subsequent text file of trc, which records various SQL operations and the time consumed, based on the trace file, we can understand which sqls cause system performance bottlenecks and take appropriate optimization methods.
When we operate the oracle database, a session is generated each time. All operations are recorded in the session, and these operations are recorded in the tr
time consuming (and boring ). here's a little shell script which can summarize Oracle heapdump output tracefile contents for you:
Http://blog.tanelpoder.com/files/scripts/tools/unix/heapdump_analyzer
After taking a heapdump, you just run to get a heap summary, total allocation sizes grouped by parent heap, chunk comment and chunk size.
heapdump_analyzer tracefile.trc
Here's an example of a shared pool dump analysis (heapdump at level 2 ):
SQL> alter session set events 'immediate trace name heap
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.