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[CASSANDRA-7438] Serializing Row cache alternative (Fully off heap) - Cassandra - [issue]
...Currently SerializingCache is partially off heap, keys are still stored in JVM heap as BB, There is a higher GC costs for a reasonably big cache. Some users have used the row cache efficien...
http://issues.apache.org/jira/browse/CASSANDRA-7438    Author: Vijay, 2015-01-22, 10:06
[CASSANDRA-6544] Reduce GC activity during compaction - Cassandra - [issue]
...We are noticing increase in P99 while the compactions are running at full stream. Most of it is because of the increased GC activity (followed by full GC).The obvious solution/work around is...
http://issues.apache.org/jira/browse/CASSANDRA-6544    Author: Vijay, 2015-01-21, 22:13
[CASSANDRA-3930] CommitLogSegment uses RandomAccessFile which doesnt have fadvice - Cassandra - [issue]
...Wondering if we even need MMap file in this case as it is always sequential.If yes, we need it we might want to replace logFileAccessor = new RandomAccessFile(logFile, "rw");tologFileAccesso...
http://issues.apache.org/jira/browse/CASSANDRA-3930    Author: Vijay, 2015-01-20, 18:02
[CASSANDRA-4914] Aggregation functions in CQL - Cassandra - [issue]
...The requirement is to do aggregation of data in Cassandra (Wide row of column values of int, double, float etc).With some basic agree gate functions like AVG, SUM, Mean, Min, Max, etc (for t...
http://issues.apache.org/jira/browse/CASSANDRA-4914    Author: Vijay, 2015-01-08, 04:56
[CASSANDRA-4139] Add varint encoding to Messaging service - Cassandra - [issue]
http://issues.apache.org/jira/browse/CASSANDRA-4139    Author: Vijay, 2014-12-11, 13:45
[CASSANDRA-5239] Asynchronous (non-blocking) StorageProxy - Cassandra - [issue]
...Problem Statement: Currently we have "rpc_min_threads, rpc_max_threads"/ "native_transport_min_threads/native_transport_max_threads" all of the threads in the TPE are blocking and takes reso...
http://issues.apache.org/jira/browse/CASSANDRA-5239    Author: Vijay, 2014-12-08, 19:58
[CASSANDRA-7897] NodeTool command to display OffHeap memory usage - Cassandra - [issue]
...Most of the highest memory consuming data structure in Cassandra is now off-heap. It will be nice to display the memory used by BF's, Index Summaries, FS Buffers, Caches and Memtables (when ...
http://issues.apache.org/jira/browse/CASSANDRA-7897    Author: Vijay, 2014-11-28, 00:17
[CASSANDRA-8362] Reduce memory usage of RefCountedMemory - Cassandra - [issue]
...We can store the references as the first 4 bytes of the Unsafe memory and use case CAS[1] for reference counting of the memory.This change will reduce the object over head + addition...
http://issues.apache.org/jira/browse/CASSANDRA-8362    Author: Vijay, 2014-11-21, 18:26
[SPARK-4402] Output path validation of an action statement resulting in runtime exception - Spark - [issue]
...Output path validation is happening at the time of statement execution as a part of lazyevolution of action statement. But if the path already exists then it throws a runtime exception. Henc...
http://issues.apache.org/jira/browse/SPARK-4402    Author: Vijay, 2014-11-17, 13:13
[CASSANDRA-3486] Node Tool command to stop repair - Cassandra - [issue]
...After CASSANDRA-1740, If the validation compaction is stopped then the repair will hang. This ticket will allow users to kill the original repair....
http://issues.apache.org/jira/browse/CASSANDRA-3486    Author: Vijay, 2014-11-10, 16:06
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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