ora 01013 user requested cancel of current operation

ORA-00001: violation of unique constraints (.) ORA-00017: Request session to set trace event ORA-00018: exceeds Max sessions ORA-00019: exceeds Max session licenses ORA-00020: exceeds Max processes () ORA-00021: Session is attached to some other

Case study of ORACLE Database disconnection When I got off work last night, I was about to shut down the ORACLE database on the local virtual machine, and then I was about to get off work. But because I opened multiple windows in SecureCRT, I

tonight the office building outage maintenance, need to shut down the server early, in order to prevent abnormal shutdown caused by various problems, There is a test library, using shutdown normal to stop the library, the result is very common hang.

Normal database disabling hang To avoid problems caused by abnormal shutdown, we have a test database that uses shutdown normal to stop the database. The result is that the hang is very common.   Operation Sequence:? 1. shutdown normal, and then

Rac _ production database log group corruption handling, rac logs Original Works are from the "Deep Blue blog" blog. Be sure to indicate the source when reprinting. Otherwise, you have the right to pursue legal liability for copyright. Deep Blue

Lab Environment:OEL5.6 Oracle11.2.0.1Experiment begins:Database run state, delete all logs:[[email protected] test]$ lsControl01.ctl Redo01.log sysaux01.dbf undotbs01.dbfDATA_OL01.DBF Redo02.log system01.dbf users01.dbfEXAMPLE01.DBF Redo03.log temp01

Original works, from the "Blue Blog" blog, when reproduced please be sure to indicate the source, otherwise have the right to pursue copyright legal responsibility.Deep Blue

MASICONG @ orcl> select sid from v $ mystat where rownum = 1; SID ---------- 35 MASICONG @ orcl> select sid from v $ mystat where rownum = 1; SID ---------- 1 1. Simulate the blocking example caused by insert, update, and delete, describe the

In the query for the 2 billion record large table, it was found that Oracle's execution plan selection was not stable, of course, this is the normal behavior of the CBO, but when the choice is different, the result is huge. In the following query,

In use EXPTools for exporting BackupOr migrate the data sometimes will report a lot of "exp-00091:exporting questionable statistics" error, the specific phenomenon and processing method please watch ... 1. The phenomenon of problems [oracle@rh207