Ora-01115 Io Error Reading Block From File 5
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ORA-1115 IO error ora-01115: io error reading block from file 4 reading block from file tips Oracle Database Tips by Burleson Consulting February 11, 2015 Question: I am running a dbms_stats job with default_degree and I'm ora-01115 ora-01110 ora-15081 getting a ORA-01115 error. This is an 8 CPU server running 10g on HP/UX. BEGIN DBMS_STATS.GATHER_DICTIONARY_STATS (ESTIMATE_PERCENT => DBMS_STATS.AUTO_SAMPLE_SIZE, METHOD_OPT => 'FOR ALL COLUMNS SIZE AUTO', DEGREE => DBMS_STATS.DEFAULT_DEGREE, GRANULARITY => 'ALL', CASCADE => TRUE, OPTIONS => 'GATHER', NO_INVALIDATE => FALSE); END;*ERROR at line 1:ORA-12801:Ora-27070 Async Read/write Failed
error signaled in parallel query server P012ORA-01115: IO error reading block from file 22 (block # 969)ORA-27072: File I/O error I only have 8 CPU's and I don't understand why Oracle fired-off 12 parallel query slaves (parallel query server P012). What causes this ORA-01115 error in automatic parallel query? When I manually reduce the parallelism, it runs fine! Answer: The docs note this about the ORA-01115 error, the ORA-01115 is a transient I/O error not related to block corruption: ORA-01115: IO error reading block from file string (block # string) Cause: Device on which the file resides is probably offlineAction: Restore access to the device Using 12 parallel query slaves probably not optimal for an 8 CPU server, and Oracle may have over-estimated the optimal degree of parallelism. Here are the rules I use for optimizing the degree of parallelism. Also note that using parallel automatic tuning can HURT your performance, and I prefe
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IO error reading block from file (block # ) - a list of ora-01115 ora-01110 ora-27070 common causes There are situations when a single issue could arise for different reasons. Will list out some of ora-01115: io error reading block from file ora-27072: file i/o error the common causes of an 'ORA-01115: IO error reading block from file (block # )' error over here. Typically, when Oracle failed to read a data block from an open data http://www.dba-oracle.com/t_ora_1115_io_error_reading_block_from_file.htm file, it throws an ORA-01115 error. Before you suspect any database issue, it is advised to have a close look at the error message stack presented before and after the ORA-01115 error in the database alert.log file. As there could be a different reason for this error when comparing the same error over the net or previous occurrence, it is pretty important that http://jaffardba.blogspot.com/2013/06/ora-01115-io-error-reading-block-from.html you isolate the issue looking at the other error messages represented along with this error. One of the following would be the most common reasons for the error: the datafile in the context is OFFLINE database might have lost communication with the underlying ASM instance caused by any hardware problems physical data block corruption at the storage level a Oracle BUG We have encountered similar issue in one of our RAC databases due to communication loss with the underlying ASM instance. Here is the alert.log entries: WARNING: ASM communication error: op 0 state 0x0 (15055)ERROR: direct connection failure with ASMERROR: paging ASM fault extent map failed gn=28 fn=256 extet=715Errors in file /u00/app/oracle/diag/rdbms/xxxDB/xxxDB2/trace/xxxDB2D2_ora_21886.trc:ORA-00704: bootstrap process failureORA-01115: IO error reading block from file (block # )ORA-01110: data file 1: '+DG_DATA/xxxdb/datafile/system.256.680619545'ORA-15055: unable to connect to ASM instanceORA-15055: unable to connect to ASM instanceORA-00020: maximum number of processes (100) exceededORA-00704: bootstrap process failureORA-01115: IO error reading block from file (block # )ORA-15055: unable to connect to ASM instanceORA-15055: unable to connect to ASM instanceORA-00020: maximum number of processes (100) exceededError 704 happened during db open, shutting down databaseUSER (ospid: 21886): terminating t
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