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[HBASE-12311] Version stats in HFiles? - HBase - [issue]
...In HBASE-9778 I basically punted the decision on whether doing repeated scanner.next() called instead of the issueing (re)seeks to the user.I think we can do better.One way do that is mainta...
http://issues.apache.org/jira/browse/HBASE-12311    Author: Lars Hofhansl, 2014-10-22, 22:42
[HBASE-12303] Seek to next row after family delete markers - HBase - [issue]
...Currently we seek to the next column when we encounter a family delete marker.I think we safely seek the current store to next row.We ran into a scenario with very slow scans after a lot of ...
http://issues.apache.org/jira/browse/HBASE-12303    Author: Lars Hofhansl, 2014-10-21, 19:10
[PHOENIX-1257] Upserted data seen by SELECT in UPSERT SELECT execution - Phoenix - [issue]
...I have the following scenario:create sequence keys;create table X (pk unsigned_long primary key, val integer);upsert into x values (1,1);Followed by repeated:upsert into x select next value ...
http://issues.apache.org/jira/browse/PHOENIX-1257    Author: Lars Hofhansl, 2014-10-11, 06:25
[PHOENIX-1292] Some queries that filter all rows are slow. - Phoenix - [issue]
...Sorry for the vague title.As mentioned PHOENIX-1281, I have seen some runtime anomalies for queries that should take similar amounts of time.40m row tables, 4 integer column + integer key. A...
http://issues.apache.org/jira/browse/PHOENIX-1292    Author: Lars Hofhansl, 2014-09-30, 20:49
[PHOENIX-1304] Customize "full scan" behavior - Phoenix - [issue]
...Most databases by default avoid filling the block cache during full scans.Typically either stats are consulted to decide whether a full scan should fill the blockcache, or a subset of the bl...
http://issues.apache.org/jira/browse/PHOENIX-1304    Author: Lars Hofhansl, 2014-09-30, 00:22
[PHOENIX-1282] Remove usage of KeyValueUtil.ensureKeyValue - Phoenix - [issue]
...We're doing a push in HBase to get rid of these.It was just added a temporary relieve while we covert everything to Cells.In most cases the Cell API is all that is needed and we should remov...
http://issues.apache.org/jira/browse/PHOENIX-1282    Author: Lars Hofhansl, 2014-09-25, 23:40
[PHOENIX-1281] Each MultiKeyValueTuple.setKeyValues creates a new immutable list object - Phoenix - [issue]
...I looked through all callers of this method, and in each case we have a fresh List object anyway, and hence the wrapping is not necessary saving at least one new object per row scanned.This ...
http://issues.apache.org/jira/browse/PHOENIX-1281    Author: Lars Hofhansl, 2014-09-25, 19:39
[PHOENIX-1280] ColumnProjectionFilter creates too many ImmutableBytesPtrs - Phoenix - [issue]
...While tracing through allocated objects during some queries I find that many ImmutableBytesPtr objects are created. One offender is ColumnProjectionFilter which first creates the columns to ...
http://issues.apache.org/jira/browse/PHOENIX-1280    Author: Lars Hofhansl, 2014-09-25, 16:51
[PHOENIX-36] Parallel Scaling - Phoenix - [issue]
...Right now the parallel scaling is defined by a constant (I think 32) that defines the number of threads/splits that can drive a single query.This number might be too large for a small cluste...
http://issues.apache.org/jira/browse/PHOENIX-36    Author: Lars Hofhansl, 2014-09-16, 20:37
[HBASE-11876] RegionScanner.nextRaw(...) should not update metrics - HBase - [issue]
...I added the RegionScanner.nextRaw(...) to allow "smart" client to avoid some of the default work that HBase is doing, such as {start|stop}RegionOperation and synchronized(scanner) for each r...
http://issues.apache.org/jira/browse/HBASE-11876    Author: Lars Hofhansl, 2014-09-03, 20:40
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