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Add initial_auto_readahead_size and max_auto_readahead_size to db_bench (#10539) 

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/10539

Reviewed By: anand1976

Differential Revision: D38837111

Pulled By: akankshamahajan15

fbshipit-source-id: eb845c6e15a3c823ff6113395817388ff15a20b1
This commit is contained in:
Akanksha Mahajan 2022-08-18 18:03:44 -07:00 committed by Facebook GitHub Bot
parent 91166012c8
commit 5956ef0089
1 changed files with 18 additions and 0 deletions
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18
tools/db_bench_tool.cc
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@ -1218,6 +1218,20 @@ DEFINE_string(backup_dir, "",
DEFINE_string(restore_dir, "",
"If not empty string, use the given dir for restore.");
DEFINE_uint64(
initial_auto_readahead_size,
ROCKSDB_NAMESPACE::BlockBasedTableOptions().initial_auto_readahead_size,
"RocksDB does auto-readahead for iterators on noticing more than two reads "
"for a table file if user doesn't provide readahead_size. The readahead "
"size starts at initial_auto_readahead_size");
DEFINE_uint64(
max_auto_readahead_size,
ROCKSDB_NAMESPACE::BlockBasedTableOptions().max_auto_readahead_size,
"Rocksdb implicit readahead starts at "
"BlockBasedTableOptions.initial_auto_readahead_size and doubles on every "
"additional read upto max_auto_readahead_size");
static enum ROCKSDB_NAMESPACE::CompressionType StringToCompressionType(
const char* ctype) {
assert(ctype);
@ -4349,6 +4363,10 @@ class Benchmark {
FLAGS_enable_index_compression;
block_based_options.block_align = FLAGS_block_align;
block_based_options.whole_key_filtering = FLAGS_whole_key_filtering;
block_based_options.max_auto_readahead_size =
FLAGS_max_auto_readahead_size;
block_based_options.initial_auto_readahead_size =
FLAGS_initial_auto_readahead_size;
BlockBasedTableOptions::PrepopulateBlockCache prepopulate_block_cache =
block_based_options.prepopulate_block_cache;
switch (FLAGS_prepopulate_block_cache) {