[ https://issues.apache.org/jira/browse/HBASE-11425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-11425: -------------------------- Attachment: heap.png Have you fellas run this for a while? I seem to OOME easy enough. I tried with a small heap, 4G, but it OOME'd then had to keep going back up to 16G again though I had a big offheap. I tried to capture the increasing use of heap but this diagram is best I got... I've not done heap analysis.. but in the diagram you can see heap use start to rise and then plummet... now I am crawling doing Full GCs every couple of seconds. The last meaningful log was this in regionserver log: 2015-10-14 16:51:10,058 DEBUG [main-BucketCacheWriter-2] bucket.BucketCache: This block 3f0157e7daee45fdb25202c496c95c46_1649898813 is still referred by 1 readers. Can not be freed now It started complaining 50minutes ago... > Cell/DBB end-to-end on the read-path > ------------------------------------ > > Key: HBASE-11425 > URL: https://issues.apache.org/jira/browse/HBASE-11425 > Project: HBase > Issue Type: Umbrella > Components: regionserver, Scanners > Affects Versions: 0.99.0 > Reporter: Anoop Sam John > Assignee: Anoop Sam John > Attachments: BenchmarkTestCode.zip, Benchmarks_Tests.docx, > HBASE-11425-E2E-NotComplete.patch, HBASE-11425.patch, Offheap reads in HBase > using BBs_V2.pdf, Offheap reads in HBase using BBs_final.pdf, gc.png, > gets.png, heap.png, load.png, median.png > > > Umbrella jira to make sure we can have blocks cached in offheap backed cache. > In the entire read path, we can refer to this offheap buffer and avoid onheap > copying. > The high level items I can identify as of now are > 1. Avoid the array() call on BB in read path.. (This is there in many > classes. We can handle class by class) > 2. Support Buffer based getter APIs in cell. In read path we will create a > new Cell with backed by BB. Will need in CellComparator, Filter (like SCVF), > CPs etc. > 3. Avoid KeyValue.ensureKeyValue() calls in read path - This make byte copy. > 4. Remove all CP hooks (which are already deprecated) which deal with KVs. > (In read path) > Will add subtasks under this. -- This message was sent by Atlassian JIRA (v6.3.4#6332)