CI是一种什么类型enqueue

shiri512003

CI - CROSS INSTANCE CALL
.  V7 - Extent-based checkpoints. DBWR has to find and flush all blocks from extents
used in a parallel query prior to doing direct reads
.  V8 - Taken out to checkpoint an object or block range (see 'object flush calls');
used to flush dirty buffers to disk prior to a direct read operation (PQ)
.  exacerbated by an overly large buffer cache and parallel query combination

ylsired

1. Advanced analysts examining CI call problems in OPS
2.Release Unused Sort Segment Space CI Call
3. Instance Recovery for Parallel operation Group
4. DBWR Sync with SGA with Controlfile

看看你的数据库在出现等待的时候，是否与某一个事情有关？