ORA-02049: TIMEOUT: DISTRIBUTED TRANSACTION WAITING FOR LOCK
SYMPTOMS An application reports about multiple errors ORA-02049: timeout: distributed transaction waiting for lock in the application’s log file. RELATED A BLOCKING SESSION ORA-00060: DEADLOCK DETECTED WHILE WAITING FOR RESOURCE DIAGNOSE The error occurs when a session is trying to…
THE FAILED LOGINS AND THE FAILED LOGINS (HISTORICAL) METRICS ARE EXTREMELY SLOW RESULTING IN HIGH IO AND CPU CONSUMPTION
SYMPTOMS The Oracle Enterprise Manager Cloud Control 13c Release 3 and The Oracle Management Agent 13c release 3 are used to monitor the Oracle database 12.1.0.1.0. Both The Failed Logins and Failed Logins (Historical) Metric are enabled and execute on a regular base. The…
HOW TO TURN OFF ORACLE 12C UNIFIED AUDITING AND CLEAN UP ALL UNIFIED AUDITING RECORDS
12c AUDITING Since the Oracle Database 12c Release 12.1.0.1.0 the Oracle invented a new approach of auditing – The Unified Auditing The Unified Auditing can operate in one of 2 available auditing modes – the Mixed Mode Auditing and the Pure Unified…
HOW TO FIND A QUERY THAT IS EXECUTED BY A DATABASE METRIC IN A TARGET DATABASE
PURPOSE This testcase is made up of number of steps helping out to find out the exact query that is executed by a database metric. The example is based on the Failed Logins (Historical) metric that is regulary executed by the Oracle Enterprise Manager…
THE FAILED LOGINS METRIC QUERY IS VERY SLOW BECAUSE OF AUD$ TABLE SIZE
SYMPTOMS The Oracle Enterprise Manage Cloud Control 13c is used to monitor the Oracle database. The Failed Logins Metric is enabled and by default executed every 30 minutes. The related metric queries with SQL_ID 83jcj6at6ugq3 (12c) and 1c74605ddbvjt (11gR2) are very slow and causes…
THE AUD$ TABLE IS VERY LARGE
SYMPTOMS You noticed that your SYSTEM tablespace is too big in size. By reviewing the DBA_SEGMENTS view you found out that the most part of the SYSTEM tablespace is occupied by the AUD$ segment. You are wondering now what is the segment for and…
ORA-06512, ORA-39127, ORA-01031, ORA-39126, ORA-06502 WHEN IMPORTING FROM A DATABASE WITH THE DATABASE VAULT ENABLED
SYMPTOMS A datapump import performing through a database link fails when the Database Vault is enabled on a source database. The datapump import fails with the following error stack impdp system/password schemas=XXCMD NETWORK_LINK=PROD_SYSTEM DIRECTORY=DROPZONE LOGFILE=XXCMD_refresh_07SEP2020.import.log EXCLUDE=statistics … Processing object type SCHEMA_EXPORT/VIEW/TRIGGER ORA-39127: unexpected error…
A LOT OF FALSE ‘Global Cache Blocks Lost’ ALERTS REPORTED BY ENTERPRISE MANAGER CLOUD CONTROL 13C RELEASE 3
SYMPTOMS When the Oracle Enterprise Manager Cloud Control 13c is used to monitor the cluster database it repeatedly sends ‘Global Cache Blocks Lost‘ alerts every 5 minutes. The alert message looks like EM Event: Warning:GPPRD_GPPRD1 – Total global cache block lost is 15. Host=db-gp01.local…
STANDARD QUERY g0bggfqrddc4w CAUSES THE PL/SQL lock timer EVENT TO CONSUME MOST PART OF DBTIME
SYMPTOMS In an AWR report or a Statspack report, the PL/SQL lock timer wait event is in the Top Wait Events list. The Wait Event is consuming a large part of the database time. The average wait time of the wait event is about…
HOW TO TERMINATE ALL IDLE SESSIONS/PROCESSES IN AN ORACLE DATABASE AUTOMATICALLY
GOAL There are lots of idle sessions/processes in my database. All inactive(Idle) sessions must be disconnected automatically after 8 hours since they have become inactive(idle). SYMPTOMS The following statement shows IDLE time for all INACTIVE sessions in a database SET LINES 300 SET PAGES 999…
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