zoukankan      html  css  js  c++  java
  • ORA-04030: out of process memory when trying to allocate 152 bytes (Logminer LCR c,krvtadc)

      今天使用LogMiner找回误更新的数据时,查询v$logmnr_contents时,遇到了ORA-04030: out of process memory when trying to allocate 152 bytes (Logminer LCR c,krvtadc)错误。查了一下My Oracle Support,发现出现ORA-04030错误的原因,特摘录在此。

     

     

       如果指定了COMMITTED_DATA_ONLY选项而且发出了查询,则LogMiner会在内存中的单个事务中逐步处理所有的重做记录, 直到 logminer 找到该事务的提交记录。 因此,可能会耗尽内存,在这种情况下将出现Out of Memory错误。具体参考下面资料:

     

     

    ORA-04030: out of process memory when trying to allocate 152 bytes (Logminer LCR c,krvtadc)

     

     

    APPLIES TO:

    Oracle Database - Enterprise Edition - Version 10.2.0.4 to 12.1.0.1 [Release 10.2 to 12.1]
    Information in this document applies to any platform.
    This problem can occur on any platform.



    SYMPTOMS

    Select against logminer fails with ORA-4030 (Logminer LCR c,krvtadc).

    Following query failed:
    SELECT username, TO_CHAR(timestamp,'HH24:MI:SS'), substr(sql_redo,1,110)
    FROM v$logmnr_contents
    WHERE seg_owner='<owner name>'
    AND seg_name IN ('<table name>');

    FROM v$logmnr_contents where
    ERROR at line 2:
    ORA-4030: out of process memory when trying to allocate 56 bytes (Logminer LCR c,krvtadc)

    CAUSE

    According to the documentation in Oracle® Database Utilities:
    If the COMMITTED_DATA_ONLY option is specified and you issue a query, LogMiner stages all redo records within a single transaction in memory until LogMiner finds the commit record for that transaction. Therefore, it is possible to exhaust memory, in which case an "Out of Memory" error will be returned.

    EXECUTE DBMS_LOGMNR.ADD_LOGFILE (logfilename => '<filename>',
    options => DBMS_LOGMNR.NEW);
    EXECUTE sys.DBMS_LOGMNR.START_LOGMNR(DICTFILENAME => '<dictionary file>',
    options =>dbms_logmnr.committed_data_only);

    SOLUTION

    If this occurs, you must restart LogMiner without the COMMITTED_DATA_ONLY option specified and reissue the query.

    REFERENCES

                                                      

    参考资料:

       Select Against Logminer Fails With ORA-4030 (Logminer LCR c,krvtadc) (文档 ID 807080.1)

  • 相关阅读:
    经验谈 论前端架构的重要性
    论 Angular的混乱
    DTW 算法(转)
    软件提高发射功率原理
    (转)LSI SAS 1068E Raid CentOS 5.5 安装实例浪潮NF5220系列 分类: linux
    聚类算法总结
    信号相似性的描述
    python科学计算整理
    一个无线通信类投稿的期刊list
    2012年Elsevier旗下Computer Science期刊最新SCI影响因子排名
  • 原文地址:https://www.cnblogs.com/kerrycode/p/10206255.html
Copyright © 2011-2022 走看看