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ircd::db: Column table options package post rocksdb v5.15 upgrade.

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This commit is contained in:
Jason Volk 2018-10-16 01:25:02 -07:00
parent 167eb18470
commit df4ad6daca
1 changed files with 13 additions and 6 deletions
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19
ircd/db.cc
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@ -1429,11 +1429,23 @@ ircd::db::database::column::column(database *const &d,
// Block based table index type.
table_opts.index_type = rocksdb::BlockBasedTableOptions::kTwoLevelIndexSearch;
table_opts.enable_index_compression = false;
table_opts.partition_filters = true;
// Specify that index blocks should use the cache. If not, they will be
// pre-read into RAM by rocksdb internally. Because of the above
// TwoLevelIndex + partition_filters configuration on RocksDB v5.15 it's
// better to use pre-read except in the case of a massive database. No
// known deployments which exceed partitioned pre-read exist so these
// settings are unconditionally false.
table_opts.cache_index_and_filter_blocks = false;
table_opts.cache_index_and_filter_blocks_with_high_priority = false;
table_opts.pin_top_level_index_and_filter = false;
table_opts.pin_l0_filter_and_index_blocks_in_cache = false;
// Setup the block size
table_opts.block_size = this->descriptor.block_size;
table_opts.metadata_block_size = 512;
table_opts.block_size = this->descriptor.block_size;
// Setup the cache for assets.
const auto &cache_size(this->descriptor.cache_size);
@ -1453,11 +1465,6 @@ ircd::db::database::column::column(database *const &d,
// Tickers::READ_AMP_TOTAL_READ_BYTES / Tickers::READ_AMP_ESTIMATE_USEFUL_BYTES
//table_opts.read_amp_bytes_per_bit = 8;
// Specify that index blocks should use the cache. If not, they will be read into
// RAM by rocksdb internally which is bad for a large db and/or small block sizes.
table_opts.cache_index_and_filter_blocks = true;
table_opts.cache_index_and_filter_blocks_with_high_priority = true;
// Finally set the table options in the column options.
this->options.table_factory.reset(rocksdb::NewBlockBasedTableFactory(table_opts));