Using Autotrace SQL> set autotrace traceonly explain SQL> select ename from emp where sal > 500; Execution Plan ———————————————————- Plan hash value: 2872589290 ————————————————————————- | Id | Operation | Name | Rows | Bytes |Cost (%CPU)| Time | ————————————————————————- | 0 | SELECT STATEMENT | | 1 | 25 | 2 (0)| 00:00:01 | |* […]
Category: ORACLE DATABASE
Quiescing a Oracle Database
There are times when a DBA needs to perform work on the database that requires no other ACTIVE sessions. This is very common is development databases, where a DBA tries to run a package or a modify a table when the application is till running. There are also frequent occurrences where too much IT support […]
Startup And Shutdown Modes Of An Oracle Database
An oracle database can be started in various modes. Each mode is used by the DBA’s to perform some specific operation in the database. Nomount State: We can bring database to nomount state from shutdown state. When we start an oracle database in nomount state then oracle will create the oracle instance. The instance is […]
Oracle Proxy Users
If you have required privileges, it’s possible to connect as a user account without knowing or changing his password. This is called proxy connection. To authorize a user account to connect using a proxy account, use the GRANT CONNECT THROUGH clause of the ALTER USER statement. Consider, we have a Application User called ‘APPUSR‘ and […]
ORA-00600: internal error code, arguments: [kwqitnmphe:ltbagi]
Recently started seeing this error on few of the RAC environments. Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl01/trace/orcl01_q002_5570998.trc: ORA-00600: internal error code, arguments: [kwqitnmphe:ltbagi], [1], [0], [], [], [], [], [], [], [], [], [] As per metalink this is a known Bug 20987661 – Doc ID 20987661.8 DECLARE po dbms_aqadm.aq$_purge_options_t; BEGIN po.block := FALSE; DBMS_AQADM.PURGE_QUEUE_TABLE( queue_table => […]
ORA-00600: internal error code, arguments: [ksprcvsp:ksfdread_resilver]
On an Oracle 11204 restart environment, ASM spfile creation failed with error ora-600 create spfile=’+DATA5′ from pfile=’/u03/asmpfile.ora’ * ERROR at line 1: ORA-01078: failure in processing system parameters ORA-00600: internal error code, arguments: [ksprcvsp:ksfdread_resilver],[0x0A2435D48], [3], [0x7F710EE38000], [512], [], [], [], [], [], [], [] This was caused due to a ASM disk with UNKNOWN HEADER_STATUS. […]
ORA-00600: internal error code, arguments: [kzsrgpw]
Recently I started getting ORA-00600 error, while I was trying to connect to SQLPlus sqlplus sys as sysdba SQL*Plus:Release 11.2.0.3.0 Production on Tue Jan 17 06:13:16 2017 Copyright (c) 1982, 2011, Oracle. All rights reserved. Enter password: ERROR: ORA-00600: internal error code, arguments: [kzsrgpw], [], [], [], [], [], [], [], [], [], [], [] […]
HugePages for Oracle
If you run a Oracle Database on a Linux Server with more than 16 GB physical memory and your System Global Area (SGA) is greater than 8 GB, you should configure HugePages. For large SGA sizes, HugePages can give substantial benefits in virtual memory management. Without HugePages, the memory of the SGA is divided into […]
Fractured block in Oracle
A block in which the header and footer are not consistent at a given SCN. In a user-managed backup, an operating system utility can back up a datafile at the same time that DBWR is updating the file. It is possible for the operating system utility to read a block in a half-updated state, so that […]
Monitoring changes to Oracle tables
I must thank my fellow DBA Franky Weber Faust for his publication in his blog. The main purpose of this type of monitoring, in my opinion, is to know the most altered tables, the amount of changes in these tables since the last collection of statistics. Why since the last collection of statistics? Because every time a […]