原创 DB2_COMPATIBILITY_VECTOR=ORA, DATE type
When using Oracle compatibility features on DB2 9.7 (by setting DB2_COMPATIBILITY_VECTOR registry variable to ORA), DATE
2020-05-31 19:17:33
1
原创 Resolve contention on "workspace_lru_latch"
Problem:In high-workload OLTP systems, contention on "SQLO_LT_sqlra_workspace_mhashcb__workspace_lru_latch" ("workspace_
2019-07-19 13:24:02
原创 PureScale不支持的特性, 表與表空間設計的考慮.
TABLESPACE:Only automatic storage table spaces can be created in a DB2 pureScale environment.In a DB2 pureScale environm
2019-02-22 23:02:53
原创 常見的SQL0805N解決方法
Knowledge Collection: SQL0805Nhttp://www-01.ibm.com/support/docview.wss?uid=swg21358478SQL0805N - package NULLID.SYSSH2
2019-02-22 23:02:53
11
原创 db2top help
The db2top tool is a monitoring tool that comes packaged with every copy of DB2 for Linux and Unix as of version 9.1 FP6
2018-09-11 02:30:00
3
原创 IC90024,爲什麼沒有選擇NLJOIN?
IC90024: OPTIMIZER MIGHT FAVOUR HSJOIN OVER AN ORDERED NLJOIN The optimizer might favour a hash join (HSJOIN) over a
2018-09-11 02:30:00
原创 db2ilist returns blank
The db2ilist command calls either db2iset or db2set depending on the permissions defined for db2iset.db2iset is meant to
2018-09-11 02:30:00
原创 v97fp5後, load問題診斷方法增強.
DB2 9.7 FP5及以後, 新增-load選項, 通過loadid可以獲得所有相關的EDU和stack數據.$ db2 list utilities show detailID
2018-09-11 02:30:00
原创 表空間數據結構研究_01
Space Map Pages (SMPs) hold track of which extents are used and which are free.Extent Map Pages (EMPs) store the mapping
2018-09-11 02:30:00
原创 坑爹的APAR IT08059.
最近, 爲了解決客戶某個重要的數據庫Crash的問題, 從v97fp9升級到了v97fp10.過了幾天, 活動日誌滿了.早上被客戶call起, 急忙趕到現場. 發現是某個應用長時間hold住了最早的事務日誌, force不了, 應該是han
2018-09-11 02:30:00
1
原创 Crash Recovery & SOFTMAX
Redo starting point is minimum of (MinBuffLSN, LowTranLSN)1) MinBuffLSN represents oldest change to page in the buffer p
2018-09-11 02:29:59
原创 pureScale環境, 版本兼容很重要.
AIX 7.1 TL3 SP4, AIX 6.1 TL9 SP4 + pureScale V10.5: (2015-01-30)These service packs install RSCT 3.2.0.0. Previous SPs w
2018-09-11 02:29:59
原创 db2dart,/DDEL導出某個schema下的表數據.
db2dart sample /ddelTable object data formatting start.Please enter Table ID or name, tablespace ID, first page, num of
2018-09-11 02:29:59
原创 RS隔離級別導致的鎖超時
客戶某個數據庫突然鎖超時增多.通過分析db2locktimeout文件, 發現90%的locktimeout的原因都是因爲Read Stability隔離級別導致的。主要涉及的表：P_CUSTOM_ARCH_TABLE,P_CUSTOM_T
2018-09-11 02:29:59
原创 DB2V9.7, Toad報SQL0401N的錯誤.
錯誤信息:The data types of the operands for the operation "=" are not compatible or comparable. 原因:db2set設置了DB2_COMPATIBI
2018-09-11 02:29:59