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DB2性能优化 – 如何通过调整锁参数优化锁升级-Lex的博客

 6 years ago
source link: http://blog.51cto.com/5063935/2074306
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1、概念描述所谓的锁升级(lock escalation),是数据库的一种作用机制,为了节约内存的开销, 其会将为数众多并占用大量资源的细粒度的锁转化为数量较少的且占用相对较少资源的粗粒度的锁,多数情况下主要指将为数众多的行锁升级为一个表锁。 当然,DB2 支持很多粒度的锁,如表空间(table space),表(table),行(row)以及索引(index)等。一般涉及到锁升级优化的参数调整,

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