- 浏览: 1074637 次
- 性别:
- 来自: 西安
最新评论
-
gaoyun_66:
扯淡,都错的.不要误导别人.主键建在分区字段上,不会报错么?( ...
SQL SERVER 表及索引分区 -
y5ljue:
非常感谢、、、困惑了半天终于解决了、、 ...
一个python处理dos和unix格式文本的换行的问题 -
谭砚耘:
很好的思路
只学一点点:我的技术学习策略 -
energykey:
技术太多,学不完的。但至少要精通一门。
只学一点点:我的技术学习策略 -
huipahaimian:
请问你用了marauroa框架了吗?如何使用?
Crazy Wind手机游戏工作室最新A-RPG力作隆重登场(图)
相关推荐
### 故障处理:Oracle_lhr_队列等待之TX - row lock contention #### 一、概述 在Oracle数据库管理中,“enq:TX-rowlockcontention”是一种常见的队列等待事件,通常与行级别的锁定冲突有关。这种冲突可能会导致...
This is a bit like the way Hibernate uses optimistic locking for versioned objects. The benefit is that lock contention is totally removed because there aren’t any locks on rows! This means that ...
An intent lock indicates that SQL Server wants to acquire a shared (S) lock or exclusive (X) lock on some of the resources lower down in the hierarchy. For example, a shared intent lock placed at the ...
标题与描述:“Latch_Lock_And_Mutex_Contention_Troubleshooting” 知识点详述: ### 1. Latch机制概述 Latch是Oracle数据库中用于管理内存结构并发访问的一种低级机制,主要用于保护短暂访问的内存结构,如缓存...
3. **参考Oracle官方文档**:对于这类特定于12c版本的问题,可以参考Oracle官方的支持文档,例如文档ID 2028503.1:“12c RAC DDL Performance Issue: High 'enq: IV - contention' etc if CPU Count is Different”...
在本文档中,我们将讨论 Oracle 性能优化的一些技术和方法,包括 SGA 的优化、配置优化、排序操作诊断、Latch 竞争、Rollback(Undo)Segment 优化、Lock Contention 应用优化、Block 的效率提升等等。 一、SGA ...
In a virtualized environment, shared resources between threads need to be protected, leading to increased contention and potential performance loss. This is exacerbated by user-level spinning, where ...
3. Slot-based Scheduling: In this approach, nodes follow a predefined schedule to transmit, ensuring that only one node transmits at a time. This can be dynamic or static, depending on whether the ...
This immediately useful book starts by building a solid foundation of Storm essentials so that you learn how to think about designing Storm solutions the right way from day one. But it quickly dives ...
only a single RS-485 driver can be enabled on a network at one time it is important that the driver is disabled as quickly as possible after transmission to avoid two drivers trying to control the ...
For instance, a web browser might have one thread dedicated to displaying images or text, while another retrieves data from the network. Similarly, a word processor could have separate threads for ...
在Oracle数据库系统中,"Latch Contention"是一个关键性能问题,它涉及到多个进程或线程在尝试获取同一资源锁(Latch)时的竞争。这通常会导致系统性能下降,因为当一个进程等待另一个进程释放Latch时,数据库操作...
- **Cluster Client:** Cluster Client is a feature that allows clients to communicate with a cluster member transparently, without knowing the actual member. - **Cluster Sharding:** Cluster Sharding ...
【故障处理】enq: PS - contention 是一个Oracle数据库中常见的等待事件,通常与并行服务器(Parallel Server)的资源竞争有关。这篇博客主要讲解如何解决这类问题,并提供了详细的故障分析和解决步骤。 1. **等待...
digital design, seems to be more of a whimsical art than a systematic science, and what is the confused student to make of this controversy? Is it worth pursuing some coursework in analog electronics,...
### Latch Contention详解 #### 摘要 本文提供了Oracle RDBMS如何利用锁(latches)保护共享内存(SGA)的概述、常见的锁竞争原因及其解决方案,并总结了Quest Software进行的一些研究,该研究表明调整(现在是未...
libfontconfig, a font configuration API, is used to select fonts to use for the logical fonts for some implementations of Linux; see Fontconfig. Java XML This release contains Java API for XML ...
cause:当插入新的索引条目时,发现索引块中没有足够的空间容纳新的索引条目,索引块就会产生分裂(分为5-5分裂...这时就会表现为enq: TX - index contention。本例中索引块分裂属于5-5 分裂,此分裂可以通过awr报告观察
- **Sharing Processor Resources**: Careful planning is required to ensure that the virtual processors are allocated efficiently among the domains to prevent contention and maximize performance. ...
本篇博客主要聚焦于四种特定的序列等待事件:enq SQ - contention、row cache lock、DFS lock handle和enq SV - contention。 1. **enq SQ - contention**: 这个等待事件发生在多个会话尝试获取对序列(sequence...