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sdong df9069d23f In DB::NewIterator(), try to allocate the whole iterator tree in an arena 
Summary:
In this patch, try to allocate the whole iterator tree starting from DBIter from an arena
1. ArenaWrappedDBIter is created when serves as the entry point of an iterator tree, with an arena in it.
2. Add an option to create iterator from arena for following iterators: DBIter, MergingIterator, MemtableIterator, all mem table's iterators, all table reader's iterators and two level iterator.
3. MergeIteratorBuilder is created to incrementally build the tree of internal iterators. It is passed to mem table list and version set and add iterators to it.

Limitations:
(1) Only DB::NewIterator() without tailing uses the arena. Other cases, including readonly DB and compactions are still from malloc
(2) Two level iterator itself is allocated in arena, but not iterators inside it.

Test Plan: make all check

Reviewers: ljin, haobo

Reviewed By: haobo

Subscribers: leveldb, dhruba, yhchiang, igor

Differential Revision: https://reviews.facebook.net/D18513
 		2014-06-02 17:44:57 -07:00
..
block.cc Enable hash index for block-based table 2014-04-10 14:19:43 -07:00
block.h Enable hash index for block-based table 2014-04-10 14:19:43 -07:00
block_based_table_builder.cc Materialize the hash index 2014-05-15 14:09:03 -07:00
block_based_table_builder.h TablePropertiesCollectorFactory 2014-05-13 12:30:55 -07:00
block_based_table_factory.cc Materialize the hash index 2014-05-15 14:09:03 -07:00
block_based_table_factory.h Materialize the hash index 2014-05-15 14:09:03 -07:00
block_based_table_reader.cc In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
block_based_table_reader.h In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
block_builder.cc [Performance Branch] PlainTable to encode rows with seqID 0, value type using 1 internal byte. 2014-02-03 12:19:30 -08:00
block_builder.h [Performance Branch] PlainTable to encode rows with seqID 0, value type using 1 internal byte. 2014-02-03 12:19:30 -08:00
block_hash_index.cc Materialize the hash index 2014-05-15 14:09:03 -07:00
block_hash_index.h Materialize the hash index 2014-05-15 14:09:03 -07:00
block_hash_index_test.cc Materialize the hash index 2014-05-15 14:09:03 -07:00
block_test.cc Materialize the hash index 2014-05-15 14:09:03 -07:00
filter_block.cc Consolidate SliceTransform object ownership 2014-03-10 12:56:46 -07:00
filter_block.h [CF] Rethinking ColumnFamilyHandle and fix to dropping column families 2014-02-12 13:47:09 -08:00
filter_block_test.cc [Performance Branch] PlainTable to encode rows with seqID 0, value type using 1 internal byte. 2014-02-03 12:19:30 -08:00
flush_block_policy.cc Remove the terrible hack in for flush_block_policy_factory 2014-02-28 16:39:27 -08:00
format.cc Fix iOS compile 2014-05-07 17:48:31 -07:00
format.h xxHash 2014-05-01 14:09:32 -04:00
iter_heap.h Turn on -Wmissing-prototypes 2014-04-09 21:17:14 -07:00
iterator.cc In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
iterator_wrapper.h In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
merger.cc In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
merger.h In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
meta_blocks.cc Materialize the hash index 2014-05-15 14:09:03 -07:00
meta_blocks.h Materialize the hash index 2014-05-15 14:09:03 -07:00
plain_table_builder.cc TablePropertiesCollectorFactory 2014-05-13 12:30:55 -07:00
plain_table_builder.h TablePropertiesCollectorFactory 2014-05-13 12:30:55 -07:00
plain_table_factory.cc Revert "Revert "Allow allocating dynamic bloom, plain table indexes and hash linked list from huge page TLB"" 2014-05-04 13:56:29 -07:00
plain_table_factory.h PlainTableFactory::PlainTableFactory() to have huge TLB turned off by default 2014-05-05 11:05:54 -07:00
plain_table_reader.cc In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
plain_table_reader.h In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
table_builder.h First phase API clean up 2014-02-03 00:30:43 -08:00
table_properties.cc Fix SIGFAULT when running sst_dump on v2.6 db 2014-04-21 17:49:47 -07:00
table_reader.h In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
table_reader_bench.cc Fix more gflag namespace issues 2014-05-09 08:41:02 -07:00
table_test.cc xxHash 2014-05-01 14:09:32 -04:00
two_level_iterator.cc In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00
two_level_iterator.h In DB::NewIterator(), try to allocate the whole iterator tree in an arena 2014-06-02 17:44:57 -07:00