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[HIVE-10215] Large IN() clauses: deep hashCode performance during optimizer pass - Hive - [issue]
...The logical optimizer uses several maps and sets, which are exceeding expensive for large IN() clauses due to the fact that several part of the queries walk over the lists without short-circ...
http://issues.apache.org/jira/browse/HIVE-10215    Author: Gopal V, 2015-04-11, 09:20
[HIVE-10298] LLAP: Cache cleaner throws Negative sleep exception - Hive - [issue]
...2015-04-10 00:33:57,791 [org.apache.hadoop.util.JvmPauseMonitor$Monitor@5cee5251()] WARN org.apache.hadoop.util.JvmPauseMonitor: Detected pause in JVM or host machine (eg GC): pause of appro...
http://issues.apache.org/jira/browse/HIVE-10298    Author: Gopal V, 2015-04-10, 20:47
[HIVE-10174] LLAP: ORC MemoryManager is singleton synchronized - Hive - [issue]
...ORC MemoryManager::addedRow() checks are bad for LLAP multi-threaded performance....
http://issues.apache.org/jira/browse/HIVE-10174    Author: Gopal V, 2015-04-08, 08:55
[HIVE-10158] LLAP: Varchar columns are not handled in encoded readers - Hive - [issue]
...ORC Varchar columns can't be read off the cacheCaused by: java.io.IOException: java.lang.ClassCastException: org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl$VarcharTreeReader cannot be cas...
http://issues.apache.org/jira/browse/HIVE-10158    Author: Gopal V, 2015-04-08, 07:49
[HIVE-10219] BytesBytesMultiHashMap::clear() can't be concurrently used with reads - Hive - [issue]
...The semantics of the HashMap::clear() is unclear for concurrent access.With HIVE-10128 fixes, the only remaining thread-safety concern is the behaviour of clear() calls.Concurrent usage + cl...
http://issues.apache.org/jira/browse/HIVE-10219    Author: Gopal V, 2015-04-07, 20:01
[HIVE-10161] LLAP: ORC file contains compression buffers larger than bufferSize (OR reader has a bug) - Hive - [issue]
...The EncodedReaderImpl will die when reading from the cache, when reading data written by the regular ORC writer Caused by: java.io.IOException: java.lang.IllegalArgumentException: Buffer siz...
http://issues.apache.org/jira/browse/HIVE-10161    Author: Gopal V, 2015-04-07, 02:57
[HIVE-10163] CommonMergeJoinOperator calls WritableComparator.get() in the inner loop - Hive - [issue]
...The CommonMergeJoinOperator wastes CPU looking up the correct comparator for each WritableComparable in each row.@SuppressWarnings("rawtypes")  private int compareKeys(List<Obje...
http://issues.apache.org/jira/browse/HIVE-10163    Author: Gopal V, 2015-04-06, 19:43
[HIVE-10218] LLAP: Loglevel for daemons as a startup option - Hive - [issue]
...Accept hive --service llap --loglevel WARN as a startup option....
http://issues.apache.org/jira/browse/HIVE-10218    Author: Gopal V, 2015-04-06, 05:21
[HIVE-10128] BytesBytesMultiHashMap does not allow concurrent read-only access - Hive - [issue]
...The multi-threaded performance takes a serious hit when LLAP shares hashtables between the probe threads running in parallel. This is an explicit synchronized block inside ReusableRowContain...
http://issues.apache.org/jira/browse/HIVE-10128    Author: Gopal V, 2015-04-05, 08:12
[HIVE-10175] PartitionPruning lacks a fast-path exit for large IN() queries - Hive - [issue]
...TezCompiler::runDynamicPartitionPruning() & ppr.PartitionPruner() calls the graph walker even if all tables provided to the optimizer are unpartitioned (or temporary) tables.This makes i...
http://issues.apache.org/jira/browse/HIVE-10175    Author: Gopal V, 2015-04-03, 00:07
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB