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Selection analysis of Oracle spatial query

';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 down

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

A DB instance in a 12C RAC automatically crash and reports errors such as ORA-27157, ORA-27300, etc.

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 troubleshooting

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

New Feature of Oracle11g-Description of automatic diagnosis Data Warehouse (ADR)

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

After Linux deletes a file, the space is not released.

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

Common RMAN problems in 11GR2

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

ORA-00600: internalerrorcode, arguments: [kssadd: nullpar

/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

Change sid and dbnameoracle11g database name at Oracle11g

@ 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.

Detailed analysis of Oracle tracking event: setevents

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

Application Event probe optimization of SQL Server System (1)

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

Non-RMAN recovery methods for accidental deletion of data files and Control Files

/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

Analysis of ORA-01843 and NLS_DATE_FORMAT

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:

Oracle partition and Performance Analysis

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,

Which Oracle tracking events include?

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

Vanets Routing paper Reading

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

Recovery database encountered a ORA-0600 fault

Errorsinfileu01adminUIDBudumpuidb_ora_59394.trc: ORA-00600: internalerrorcode, arguments: [krbrrd_bz2_ksfqrd_n Errors in file/u01/admin/UIDB/udump/uidb_ora_59394.trc: ORA-00600: internal error code, arguments: [krbrrd_bz2_ksfqrd_n Errors in file/u01/admin/UIDB/udump/uidb_ora_59394.trc:ORA-00600: internal error code, arguments: [krbrrd_bz2_ksfqrd_noblks], [/u01/test/tests], [576000], [], [], [], [], [],

How to Use the TKPROF command in oracle to view Tracefile

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

Oraclememorytroubleshooting, Part1: HeapdumpAnalyzer

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

ORACLE space management Experiment 5: Impact of high water level under block management ASSM-delete and query

following average value: BYS @ bys3> set autotrace traceonly stat BYS @ bys3> select * from test12; 280960 rows selected. Elapsed: 00:00:05. 70 Statistics ---------------------------------------------------------- 0 recursive cballs 0 db block gets 23504 consistent gets3710 physical reads 0 redo size 29190599 bytes sent via SQL * Net to client 206449 bytes encoded ed via SQL * Net from client 18732 SQL * Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 280960 rows processed BYS @

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