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yiwu-arbug 29877ec7b4 Fix blob db crash during calculating write amp 
Summary:
On initial call to BlobDBImpl::WaStats() `all_periods_write_` would be empty, so it will crash when we call pop_front() at line 1627. Apparently it is mean to pop only when `all_periods_write_.size() > kWriteAmplificationStatsPeriods`.

The whole write amp calculation doesn't seems to be correct and it is not being exposed. Will work on it later.

Test Plan
Change kWriteAmplificationStatsPeriodMillisecs to 1000 (1 second) and run db_bench --use_blob_db for 5 minutes.
Closes https://github.com/facebook/rocksdb/pull/2751

Differential Revision: D5648269

Pulled By: yiwu-arbug

fbshipit-source-id: b843d9a09bb5f9e1b713d101ec7b87e54b5115a4
 		2017-08-17 15:01:09 -07:00
..
backupable Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
blob_db Fix blob db crash during calculating write amp 2017-08-17 15:01:09 -07:00
cassandra Enable Cassandra merge operator to be called with a single merge operand 2017-08-17 15:01:09 -07:00
checkpoint Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compaction_filters Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
convenience Change RocksDB License 2017-07-15 16:11:23 -07:00
date_tiered Add Iterator::Refresh() 2017-07-24 10:54:37 -07:00
document Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
geodb Change RocksDB License 2017-07-15 16:11:23 -07:00
leveldb_options Change RocksDB License 2017-07-15 16:11:23 -07:00
lua CodeMod: Prefer ADD_FAILURE() over EXPECT_TRUE(false), et cetera 2017-07-16 21:26:02 -07:00
memory Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_operators Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
option_change_migration Change RocksDB License 2017-07-15 16:11:23 -07:00
options Replace dynamic_cast<> 2017-07-28 16:27:16 -07:00
persistent_cache block_cache_tier: fix gcc-7 warnings 2017-08-10 11:58:53 -07:00
redis Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
simulator_cache CacheActivityLogger, component to log cache activity into a file 2017-07-28 12:36:48 -07:00
spatialdb Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
table_properties_collectors Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
transactions fix some misspellings 2017-08-16 21:57:20 -07:00
ttl Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
write_batch_with_index Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
col_buf_decoder.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
col_buf_decoder.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
col_buf_encoder.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
col_buf_encoder.h Change RocksDB License 2017-07-15 16:11:23 -07:00
column_aware_encoding_exp.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
column_aware_encoding_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
column_aware_encoding_util.cc Replace dynamic_cast<> 2017-07-28 16:27:16 -07:00
column_aware_encoding_util.h Change RocksDB License 2017-07-15 16:11:23 -07:00
debug.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
env_librados.cc Remove double buffering on RandomRead on Windows. 2017-04-27 12:30:05 -07:00
env_librados.md Add EnvLibrados - RocksDB Env of RADOS (#1222) 2016-07-21 11:16:34 -07:00
env_librados_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
env_mirror.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
env_mirror_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
env_timed.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
env_timed_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_operators.h Change RocksDB License 2017-07-15 16:11:23 -07:00
object_registry_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
util_merge_operators_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00