一、引言: [oracle@yft yft]$ oerr ora0155501555,00000, "snapshot too old:rollback segmentnumber%swith name \"%s\" too small"//*Cause:rollback records neededby a readerfor consistentreadare// overwrittenbyother writers//*Action:IfinAutomatic Undo Management mode, increase undo_retention// set...
01555, 00000, "snapshot too old: rollback segment number %s with name \"%s\" too small" // *Cause: rollback records needed by a reader for consistent read // are overwritten by other writers // *Action: If in Automatic Undo Management mode, increase // undo_retention setting. Otherwis...
突然断电产生LOB大字段的损坏报错通常是ORA-01555: snapshot too old: rollback segment number with name "" too small 或者ORA–00600未知错误等,如果按快照太旧这个根本解决不了问题,因为查询会发现UNDO表空间使用率很低,其实是该表有BLOB或CLOB字段损坏问题造成的,解决方法如下(做前先停止业务): 1.创建表存...
一、引言: [oracle@yft yft]$ oerr ora0155501555,00000, "snapshot too old:rollback segmentnumber%swith name \"%s\" too small"//*Cause:rollback records neededby a readerfor consistentreadare// overwrittenbyother writers//*Action:IfinAutomatic Undo Management mode, increase undo_retention// set...
【问题】: (FAQ)点击报表时提示select data error.ORA-01555: snapshot too old: rollback segment number with name "" too small ORA-22924: snapshot too old 版本: 7.0.1 模块: 系统部署 【答复】: 原因分析: 1、并发事务过多,或者存在耗时的大事务,导致undo表空间不够用。
01555, 00000, "snapshot too old: rollback segment number %s with name \"%s\" too small" // *Cause: rollback records needed by a reader for consistent read // are overwritten by other writers // *Action: If in Automatic Undo Management mode, increase ...
ORA-01555: snapshot too old: rollback segment number 6 with name "_SYSSMU6_12 The error might occur only in the application log, but not necessarily in the alert file. There may or may not be a current SQL reported in the incident trace file: --- Error Stack Dump --- ORA-01555:...
ORA-01555的直观解释是“snapshot too old”,也就是快照太旧,其根本含义就是查询需要的前镜像过于“久远”,已经无法找到了。可以想象,如果一个历时数个小时或十几个小时的查询,如果最后遭遇ORA-01555错误而失败,会是多么令人沮丧的一件事。一直以来,ORA-01555都是ORACLE最为头痛的问题之一。
ORA-01555: snapshot too old: rollback segment number with name "" too small ORA-22924: snapshot too old 个人认为报快照过旧绝大部分可能原因是undo表空间不足或保留时间设置问题。本次着重讨论表数据损毁引起的报错。 1.先查看表空间的使用率 ...