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ircd::db: Tweak write-side column buffer and level0 scale; concurrent flush.

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This commit is contained in:
Jason Volk 2020-09-14 16:15:43 -07:00
parent a90191792e
commit f7400edc75
1 changed files with 13 additions and 5 deletions
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18
ircd/db.cc
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@ -2075,10 +2075,10 @@ ircd::db::database::column::column(database &d,
//this->options.bottommost_compression_opts = this->options.compression_opts;
//TODO: descriptor / conf
static const auto write_buffer_blocks{2048L};
static const auto write_buffer_blocks {2048L};
static const long write_buffer_size_minmax[]
{
256_KiB, 4_MiB
256_KiB, 8_MiB
};
// Derive the write buffer size from the block size
@ -2089,9 +2089,18 @@ ircd::db::database::column::column(database &d,
write_buffer_size_minmax[1]
);
this->options.max_write_buffer_number = 16;
this->options.max_write_buffer_number = 32;
this->options.min_write_buffer_number_to_merge = 2;
this->options.max_write_buffer_number_to_maintain = 8;
this->options.max_write_buffer_number_to_maintain = 0;
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR > 5) \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR == 5 && ROCKSDB_PATCH >= 2)
this->options.max_write_buffer_size_to_maintain = 0; //this->options.write_buffer_size * 4;
#endif
this->options.level0_file_num_compaction_trigger = 8;
this->options.level0_slowdown_writes_trigger = 32;
this->options.level0_stop_writes_trigger = 64;
// Conf item can be set to disable automatic compactions. For developers
// and debugging; good for valgrind.
@ -2120,7 +2129,6 @@ ircd::db::database::column::column(database &d,
this->options.num_levels = 7;
this->options.level_compaction_dynamic_level_bytes = false;
this->options.level0_file_num_compaction_trigger = 8;
//this->options.ttl = -2U;
#ifdef IRCD_DB_HAS_PERIODIC_COMPACTIONS