一次vm虚拟机时间倒流而导致的oracle数据库启动故障
一次vm 虚拟机时间倒流而导致的oracle 数据库启动故障 本文是原创文章,若转载请注明出处: http://blog.csdn.net/msdnchina/article/details/38782163 直接上数据库的alert日志: Fri Apr 25 22:00:54 2014 -----注意该时间Archived Log entry 1766 added f
一次vm 虚拟机时间倒流而导致的oracle 数据库启动故障
本文是原创文章,若转载请注明出处:
http://blog.csdn.net/msdnchina/article/details/38782163
直接上数据库的alert日志:
Fri Apr 25 22:00:54 2014 <-----注意该时间 Archived Log entry 1766 added for thread 1 sequence 1770 ID 0x4e0785c3 dest 1: Sun Sep 02 23:04:52 2012 <-----注意该时间 Starting ORACLE instance (normal) ************************ Large Pages Information ******************* Per process system memlock (soft) limit = 32 KB Total Shared Global Region in Large Pages = 0 KB (0%) Large Pages used by this instance: 0 (0 KB) Large Pages unused system wide = 0 (0 KB) Large Pages configured system wide = 0 (0 KB) Large Page size = 2048 KB RECOMMENDATION: Total System Global Area size is 4226 MB. For optimal performance, prior to the next instance restart: 1. Increase the number of unused large pages by at least 2113 (page size 2048 KB, total size 4226 MB) system wide to get 100% of the System Global Area allocated with large pages 2. Large pages are automatically locked into physical memory. Increase the per process memlock (soft) limit to at least 4234 MB to lock 100% System Global Area's large pages into physical memory ******************************************************************** LICENSE_MAX_SESSION = 0 LICENSE_SESSIONS_WARNING = 0 Initial number of CPU is 4 CELL communication is configured to use 0 interface(s): CELL IP affinity details: NUMA status: non-NUMA system cellaffinity.ora status: N/A CELL communication will use 1 IP group(s): Grp 0: Picked latch-free SCN scheme 3 Using LOG_ARCHIVE_DEST_1 parameter default value as USE_DB_RECOVERY_FILE_DEST Autotune of undo retention is turned on. IMODE=BR ILAT =51 LICENSE_MAX_USERS = 0 SYS auditing is disabled Starting up: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options. ORACLE_HOME = /opt/oracle/product/11g/dbname_1 System name: Linux Node name: oracle Release: 2.6.18-371.el5 Version: #1 SMP Thu Sep 5 21:21:44 EDT 2013 Machine: x86_64 VM name: VMWare Version: 6 Using parameter settings in server-side spfile /opt/oracle/product/11g/dbname_1/dbs/spfileorcl.ora System parameters with non-default values: processes = 300 sessions = 472 nls_language = "SIMPLIFIED CHINESE" nls_territory = "CHINA" sga_target = 4224M control_files = "/oracledata/orcl/control01.ctl" control_files = "/opt/oracle/fast_recovery_area/orcl/control02.ctl" control_files = "/oracledata/orcl/control03.ctl" control_files = "/oracledata/orcl/control04.ctl" control_files = "/oracledata/orcl/control05.ctl" db_block_size = 8192 compatible = "11.2.0.4.0" log_archive_format = "%t_%s_%r.dbf" db_files = 2000 db_recovery_file_dest = "/opt/oracle/fast_recovery_area" db_recovery_file_dest_size= 40G undo_tablespace = "UNDOTBS1" remote_login_passwordfile= "EXCLUSIVE" db_domain = "" dispatchers = "(PROTOCOL=TCP) (SERVICE=orclXDB)" audit_file_dest = "/opt/oracle/admin/orcl/adump" audit_trail = "DB" db_name = "orcl" open_cursors = 300 pga_aggregate_target = 1403M deferred_segment_creation= FALSE diagnostic_dest = "/opt/oracle" Sun Sep 02 23:04:53 2012 PMON started with pid=2, OS id=4452 Sun Sep 02 23:04:53 2012 PSP0 started with pid=3, OS id=4454 Sun Sep 02 23:04:54 2012 VKTM started with pid=4, OS id=4456 at elevated priority Sun Sep 02 23:04:54 2012 GEN0 started with pid=5, OS id=4460 VKTM running at (1)millisec precision with DBRM quantum (100)ms Sun Sep 02 23:04:54 2012 DIAG started with pid=6, OS id=4462 Sun Sep 02 23:04:54 2012 DBRM started with pid=7, OS id=4464 Sun Sep 02 23:04:54 2012 DIA0 started with pid=8, OS id=4466 Sun Sep 02 23:04:54 2012 MMAN started with pid=9, OS id=4468 Sun Sep 02 23:04:54 2012 DBW0 started with pid=10, OS id=4470 Sun Sep 02 23:04:54 2012 LGWR started with pid=11, OS id=4472 Sun Sep 02 23:04:54 2012 CKPT started with pid=12, OS id=4474 Sun Sep 02 23:04:54 2012 SMON started with pid=13, OS id=4476 Sun Sep 02 23:04:54 2012 RECO started with pid=14, OS id=4478 Sun Sep 02 23:04:55 2012 MMON started with pid=15, OS id=4480 Sun Sep 02 23:04:55 2012 MMNL started with pid=16, OS id=4482 starting up 1 dispatcher(s) for network address '(ADDRESS=(PARTIAL=YES)(PROTOCOL=TCP))'... starting up 1 shared server(s) ... ORACLE_BASE from environment = /opt/oracle Sun Sep 02 23:04:55 2012 ALTER DATABASE MOUNT Successful mount of redo thread 1, with mount id 1320728727 Database mounted in Exclusive Mode Lost write protection disabled Completed: ALTER DATABASE MOUNT Sun Sep 02 23:04:59 2012 ALTER DATABASE OPEN Beginning crash recovery of 1 threads parallel recovery started with 3 processes Started redo scan Completed redo scan read 69 KB redo, 66 data blocks need recovery Started redo application at Thread 1: logseq 1771, block 16853 Recovery of Online Redo Log: Thread 1 Group 1 Seq 1771 Reading mem 0 Mem# 0: /oracledata/orcl/redo01.log Completed redo application of 0.04MB Completed crash recovery at Thread 1: logseq 1771, block 16992, scn 13030631482598 66 data blocks read, 66 data blocks written, 69 redo k-bytes read ************************************************************ Warning: The SCN headroom for this database is only -652 hours! ************************************************************ Errors in file /opt/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_4492.trc (incident=43353): ORA-00600: internal error code, arguments: [kcm_headroom_warn_1], [], [], [], [], [], [], [], [], [], [], [] Incident details in: /opt/oracle/diag/rdbms/orcl/orcl/incident/incdir_43353/orcl_ora_4492_i43353.trc Use ADRCI or Support Workbench to package the incident. See Note 411.1 at My Oracle Support for error and packaging details. Errors in file /opt/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_4492.trc: ORA-00600: internal error code, arguments: [kcm_headroom_warn_1], [], [], [], [], [], [], [], [], [], [], [] ORA-600 signalled during: ALTER DATABASE OPEN... Dumping diagnostic data in directory=[cdmp_20120902230501], requested by (instance=1, osid=4492), summary=[incident=43353]. Sun Sep 02 23:05:58 2012 Sweep [inc][43353]: completed Sweep [inc2][43353]: completed Sun Sep 02 23:19:58 2012 db_recovery_file_dest_size of 40960 MB is 29.05% used. This is a user-specified limit on the amount of space that will be used by this database for recovery-related files, and does not reflect the amount of space available in the underlying filesystem or ASM diskgroup. Sun Sep 02 23:38:25 2012

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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