dop connect

"In the latest release 10.2 Oracle changed these default values. The memory allocated to a single SQL operator (_ smm_max_size) is limited:For P_A_T For P_A_T between 500 MB and 1000 MB the parameter _ smm_max_size = 100 MFor P_A_T betweeen 1001 MB

What is parallelism?We have heard from a young age, "more people, more power," "Good people," and so on, the core of the idea is to assign a task to many people, so that everyone only need to do a few things to complete the task. More importantly,

1. Scan the partition table in PARALLEL by ROWID: select/* + PARALLEL (SALES, 9) */* FROMSALES; V $ PQ_TQSTAT: allows you to view statistics on PARALLEL operations. helps you determine imbalance in a query. it is best to work with each parallel

"Problem phenomenon": After installing the LFTP through RPM, the execution lftp huangmr:huangmr@192.168.107.132 cannot connect (lftp huangmr@192.168.107.132:~> ls ' ls ' at 0 [delaying before reconnect:175] or has been in the connecting ... ), via

Recently, a customer asked for a GPS Vehicle Monitoring System to display the location of a car on an electronic map in real time. He had never been in touch with it before and learned from the beginning. First, you must understand the GPS signal

Deep understanding of Oracle RAC 12cJump to: Navigation, search Directory 1 Overview 2 Cluster parts management and fault diagnosis 3 Operational Practices 4 new Features 5 Storage and ASM 6

Scenario 3 Data ManagementData managementPerformance optimizationOLTP OLAPMaterialized view: A snapshot of a tableTransport table Space: Data Migration for heterogeneous platformsStar Conversions: Fact tablesOLTP: Online transaction processing1.

Sometimes, during project development, database tables may be deleted by mistake. To avoid this problem, how to strictly control whether a user cannot perform the drop permission on his/her own database requires relevant settings. Because the

Recently, I encountered a performance problem caused by dynamic sampling, which is a bit difficult for me to understand. by reading the document and doing experiments, I will summarize it as follows:Let's take a look at the Online Document's

Since 99, I began to contact with the network programming, the original project is written in C language a lot of CGI, can be described as the pain of the programming, because at that time the domestic technical level is generally relatively low, if