about Undo Tablespace used High ?

最新推荐文章于 2025-07-06 18:23:34 发布
最新推荐文章于 2025-07-06 18:23:34 发布 · 113 阅读 · 0

博客提及Undo表空间使用过高的情况，但未给出具体解决办法等更多信息，仅给出原文地址。Undo表空间使用过高可能影响数据库性能。
iteye_4537
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gp数据库报了order by的时候报了这个错
tao_wei162的博客
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Canceling query because of high VMEM usage. Used: 3659MB, available 819MB, red zone: 7372MB (runaway_cleaner.c:135)我在执行查询一个大概10亿条记录表order by的时候报了这个错，有什么好的办法解决？   1.一般是：一般是拆分大sql，利用中间临时表 把 seq_id 这...
Canceling query because of high VMEM usage. Used: 4943MB, available 564MB, red zone: 5102MB
知识的力量
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运行最大的内存 gpconfig -s gp_vmem_protect_limit gpconfig -c gp_vmem_protect_limit -m 10240 -v 10240 设置触发终止查询的Greenplum数据库vmem内存的百分比。 gpconfig -s runaway_detector_activation_percent 值为0禁用基于使用vmem百分比的查询。 gpconfig -c runaway_detector_activation_perc...
已解决：GreenPlum6 Canceling query because of high VMEM usage。大数据量插入建议关闭查询优化器
ongyanjin的博客
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背景： GP版本6.11 服务器内存16G swap 2G 源系统mysql5.7，已经针对mysql 连接添加性能优化的配置项 服务器cpu8核，kettle中设置了7个copy同时执行 GP的VMEM设置的8G show gp_vmem_protect_limit 未关闭查询优化器之前状况： 速度慢，单线程180行每秒，7个加一起才1300。 GP master内存出现异常占用情况，mysql中该表300多万行，总大小不到900MB，但是master的内存却占用超过7G..
if usage
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#! /usr/bin/python #* coding: utf-8 *age = int(input("input your age: ")) if age >= 50:print('old')elif age >= 25:print ('adult')elif age >=6:print('teenager')else:print('kid') 转载于:https://bl...
undo tablespace的恢复， database能不关闭最好不要关闭
jnrjian的博客
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Solution=========or not.ORis:complete".dropped.
oracle 扩容undo,【案例】Oracle RAC数据库undo使用率较高的解决思路办法
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天萃荷净Oracle研究中心案例分析：运维DBA反映Oracle数据库undo使用较大，结合案例分析undo使用问题。本站文章除注明转载外，均为本站原创： 转载自love wife & love life —Roger 的Oracle技术博客本文链接地址: about Undo Tablespace used High今天有朋友在问关于undo 使用很高的问题,这个问题其实很常见了,上次也...
Oracle UNDO 监控
Aamir 的专栏
08-02 2311
Oracle 10g及后续版本较以前版本有一新特性即自动调整undo retention时间，大大简便了管理，对于自动扩展（autoextend on）的undo表空间，参数undo_retention设置成为Oracle自动调节undo retention的最低阀值。对于非自动扩展（autoextend off），非guarantee 的undo 表空间，Oracle会根据undo表空间大小和v
MySQL数据落盘原理(data page、redo log、undo log、binlog、xa-2pc等源码分析)
weixin_38597669的博客
05-17 1208
本文主要分析MySQL事务持久性相关的源码，比如undo,redo何时生成，如何落盘；redo和binlog如何基于xa-2pc落盘等等知识点。
2025-10-24T06:14:45.483589Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2025-10-24T06:14:45.487190Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe (mysqld 5.7.43-log) starting as process 2792 ... 2025-10-24T06:14:45.499521Z 0 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions 2025-10-24T06:14:45.500924Z 0 [Note] InnoDB: Uses event mutexes 2025-10-24T06:14:45.501775Z 0 [Note] InnoDB: _mm_lfence() and _mm_sfence() are used for memory barrier 2025-10-24T06:14:45.503093Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.13 2025-10-24T06:14:45.509869Z 0 [Note] InnoDB: Number of pools: 1 2025-10-24T06:14:45.510876Z 0 [Note] InnoDB: Not using CPU crc32 instructions 2025-10-24T06:14:45.516358Z 0 [Note] InnoDB: Initializing buffer pool, total size = 4G, instances = 8, chunk size = 128M 2025-10-24T06:14:45.739511Z 0 [Note] InnoDB: Completed initialization of buffer pool 2025-10-24T06:14:45.866688Z 0 [Note] InnoDB: Highest supported file format is Barracuda. 2025-10-24T06:14:45.917325Z 0 [Note] InnoDB: Log scan progressed past the checkpoint lsn 1818072334033 2025-10-24T06:14:45.919665Z 0 [Note] InnoDB: Doing recovery: scanned up to log sequence number 1818072343203 2025-10-24T06:14:46.501026Z 0 [Note] InnoDB: Database was not shutdown normally! 2025-10-24T06:14:46.502853Z 0 [Note] InnoDB: Starting crash recovery. 2025-10-24T06:14:53.325953Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2025-10-24T06:14:53.328050Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2025-10-24T06:14:53.331419Z 0 [Note] InnoDB: Setting file '.\ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2025-10-24T06:14:53.341449Z 0 [Note] InnoDB: File '.\ibtmp1' size is now 12 MB. 2025-10-24T06:14:53.377635Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. 2025-10-24T06:14:53.379973Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. 2025-10-24T06:14:53.382232Z 0 [Note] InnoDB: Waiting for purge to start 2025-10-24T06:14:53.434201Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 7651ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.) 2025-10-24T06:14:53.434424Z 0 [Note] InnoDB: 5.7.43 started; log sequence number 1818072343203 2025-10-24T06:14:53.440369Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=3] log sequence number 1818075015616 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.440496Z 0 [Note] InnoDB: Loading buffer pool(s) from D:\MySql\data\ib_buffer_pool 2025-10-24T06:14:53.444882Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.454213Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=2] log sequence number 1818075015133 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.457121Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.459265Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=13] log sequence number 1818075023156 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.459333Z 0 [Note] Plugin 'FEDERATED' is disabled. 2025-10-24T06:14:53.461391Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=4] log sequence number 1818074852082 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.464302Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.468966Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=8883] log sequence number 1818075644951 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.469327Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.478059Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.481293Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=5] log sequence number 1818074822726 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.488992Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.493841Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=8] log sequence number 1818073611600 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.496594Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.499300Z 0 [ERROR] InnoDB: Page [page id: space=488, page number=3] log sequence number 1818075769646 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.500195Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=22] log sequence number 1818074006086 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.503793Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.505862Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.513791Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=23] log sequence number 1818074993296 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.515785Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.524243Z 0 [ERROR] InnoDB: Page [page id: space=488, page number=527] log sequence number 1818080514186 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.528019Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.537996Z 0 [ERROR] InnoDB: Page [page id: space=540, page number=7] log sequence number 1818081166468 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.541042Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.543656Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=31] log sequence number 1818075024348 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.548712Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.554624Z 0 [ERROR] InnoDB: Page [page id: space=540, page number=4] log sequence number 1818081150547 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.558427Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.565031Z 0 [ERROR] InnoDB: Page [page id: space=539, page number=4] log sequence number 1818080173025 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.567157Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=31683] log sequence number 1818075654250 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.567489Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.571042Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.598497Z 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them. 2025-10-24T06:14:53.601463Z 0 [Note] Skipping generation of SSL certificates as certificate files are present in data directory. 2025-10-24T06:14:53.603981Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher. 2025-10-24T06:14:53.605450Z 0 [ERROR] InnoDB: Page [page id: space=743, page number=0] log sequence number 1818074641633 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.606048Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher. 2025-10-24T06:14:53.609638Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. InnoDB: Dump of the tablespace extent descriptor: len 40; hex 0000000000000000ffffffff0000ffffffff000000000002aaffffffffffffffffffffffffffffff; asc ;2025-10-24T06:14:53.618233Z 0 [ERROR] InnoDB: InnoDB is trying to free page [page id: space=743, page number=8] though it is already marked as free in the tablespace! The tablespace free space info is corrupt. You may need to dump your tables and recreate the whole database! 2025-10-24T06:14:53.622034Z 0 [ERROR] [FATAL] InnoDB: Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.624235Z 0 [Warning] CA certificate ca.pem is self signed. 2025-10-24 14:14:53 0x354c InnoDB: Assertion failure in thread 13644 in file ut0ut.cc line 921 InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html InnoDB: about forcing recovery. 2025-10-24T06:14:53.625645Z 0 [Note] Skipping generation of RSA key pair as key files are present in data directory. 2025-10-24T06:14:53.628676Z 0 [Note] Server hostname (bind-address): '*'; port: 3308 2025-10-24T06:14:53.629979Z 0 [Note] IPv6 is available. 2025-10-24T06:14:53.630668Z 0 [Note] - '::' resolves to '::'; 2025-10-24T06:14:53.632389Z 0 [Note] Server socket created on IP: '::'. 2025-10-24T06:14:53.747077Z 0 [ERROR] InnoDB: Page [page id: space=26, page number=16384] log sequence number 1818075741603 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:53.751073Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:53.924848Z 0 [Note] Failed to start slave threads for channel '' 2025-10-24T06:14:54.002381Z 0 [Note] Event Scheduler: Loaded 0 events 2025-10-24T06:14:54.003266Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe: ready for connections. Version: '5.7.43-log' socket: '' port: 3308 MySQL Community Server (GPL) 2025-10-24T06:14:54.063857Z 0 [ERROR] InnoDB: Page [page id: space=28, page number=0] log sequence number 1818073721575 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:54.067646Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:54.073181Z 0 [ERROR] InnoDB: Page [page id: space=28, page number=4] log sequence number 1818073721575 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:54.076879Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:54.081031Z 0 [ERROR] InnoDB: Page [page id: space=28, page number=5] log sequence number 1818073639109 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:54.083439Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:54.087366Z 0 [ERROR] InnoDB: Page [page id: space=488, page number=0] log sequence number 1818074963526 is in the future! Current system log sequence number 1818072347793. 2025-10-24T06:14:54.089008Z 0 [ERROR] InnoDB: Your database may be corrupt or you may have copied the InnoDB tablespace but not the InnoDB log files. Please refer to http://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html for information about forcing recovery. 2025-10-24T06:14:54.840960Z 0 [Note] InnoDB: Buffer pool(s) load completed at 251024 14:14:54
10-25
| 5 (`SRV_FORCE_NO_UNDO_LOG_SCAN`) | 不扫描 undo 日志 | | 6 (`SRV_FORCE_NO_LOG_REDO`) | 完全跳过日志重做 | --- ### 步骤二：重启 MySQL 服务 ```bash net stop mysql net start mysql ``` 观察错误日志...
oracle数据库脏读,参考oracle官方文档关于脏读、一致性读、undo中已提交数据块的理解...
weixin_33643788的博客
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脏读Dirty readsA transaction reads data that has been written by another transaction that has not been committed yet.一个事务读取另一个尚未提交的事务写入的数据。Oracle Database never permits dirty reads, which occur when a t...
GP cacheMemoryContext 异常
MyySophia的博客
05-20 2219
GP 报如下报错讯息。 org.postgresql.util.PSQLException: ERROR: Canceling query because of high VMEM usage. Used: 1663565824MB, available 0MB, red zone: 233472MB (runaway_cleaner.c:191) at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecut.
禁用VMware的vmem文件
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高效的多分辨率融合技术对具有标签不确定性的遥感数据进行处理（Matlab代码实现）
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高效的多分辨率融合技术对具有标签不确定性的遥感数据进行处理（Matlab代码实现）内容概要：本文介绍了基于Matlab代码实现的高效多分辨率融合技术，旨在处理具有标签不确定性的遥感数据。该技术通过融合不同分辨率的遥感图像，提升数据质量与分类精度，有效应对标签不准确或缺失带来的挑战。文中强调了算法在复杂遥感场景下的鲁棒性与实用性，并提供了完整的Matlab代码实现，便于科研人员复现与进一步优化。此外，文档还列举了多个相关研究方向和技术应用，涵盖电力系统、机器学习、图像处理、路径规划等领域，展示了一个综合性科研资源平台的支持能力。; 适合人群：具备一定Matlab编程基础，从事遥感数据处理、图像融合、模式识别及相关领域研究的科研人员与研究生。; 使用场景及目标：①提升遥感图像分类与目标识别的准确性；②处理带有标签噪声或不确定性的真实世界遥感数据；③开展多源遥感数据融合算法的研究与教学实践。; 阅读建议：建议读者结合提供的Matlab代码进行实践操作，深入理解多分辨率融合算法的设计思路与实现细节，同时可参考文档中列出的相关技术方向拓展研究视野。
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在 Oracle 中，`CREATE UNDO TABLESPACE` 用于创建撤销表空间，它是一种特殊类型的表空间。撤销表空间主要用于存储事务修改数据之前的旧值，属于系统级别的存储结构，与用户数据、索引等存储在不同的表空间中。 ###...
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