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Botond Dénes 3d12451d1f db/config: reader_concurrency_semaphore_cpu_concurrency: bump default to 2 
This config item controls how many CPU-bound reads are allowed to run in
parallel. The effective concurrency of a single CPU core is 1, so
allowing more than one CPU-bound reads to run concurrently will just
result in time-sharing and both reads having higher latency.
However, restricting concurrency to 1 means that a CPU bound read that
takes a lot of time to complete can block other quick reads while it is
running. Increase this default setting to 2 as a compromise between not
over-using time-sharing, while not allowing such slow reads to block the
queue behind them.

Fixes: #22450

Closes scylladb/scylladb#22679
2025-02-05 21:52:20 +02:00
..
commitlog
db/commitlog: make the commit log hard limit mandatory
2025-01-07 15:03:56 +02:00
functions
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
hints
hint manager: do not translate ip to id in case hint manager is stopped already
2025-01-16 16:37:08 +02:00
marshal
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
snapshot
backup_task: remove a component once it is uploaded
2025-01-22 11:17:01 +08:00
tags
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
view
view_builder: fix loop in view builder when tokens are moved
2025-01-30 14:35:18 +02:00
auth_version.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
batchlog_manager.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
batchlog_manager.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
cache_mutation_reader.hh
moved cache files to db
2025-02-04 12:21:31 +03:00
cache_tracker.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
chained_delegating_reader.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
CMakeLists.txt
moved cache files to db
2025-02-04 12:21:31 +03:00
config.cc
db/config: reader_concurrency_semaphore_cpu_concurrency: bump default to 2
2025-02-05 21:52:20 +02:00
config.hh
Introduce file stream for tablet
2025-01-26 12:51:59 +02:00
consistency_level_type.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
consistency_level_validations.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
consistency_level.cc
consistency_level: drop templates since the same types of ranges are used by all the callers
2025-01-16 16:37:06 +02:00
consistency_level.hh
tree: remove unused "#include"s
2025-01-28 14:12:06 +03:00
cql_type_parser.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
cql_type_parser.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
data_listeners.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
data_listeners.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
extensions.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
extensions.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
heat_load_balance.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
heat_load_balance.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
large_data_handler.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
large_data_handler.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
legacy_schema_migrator.cc
Introduce incremental compaction strategy (ICS)
2025-01-04 15:43:52 +02:00
legacy_schema_migrator.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
operation_type.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
partition_snapshot_row_cursor.hh
moved cache files to db
2025-02-04 12:21:31 +03:00
paxos_grace_seconds_extension.hh
utils: do not include unused headers
2025-01-14 07:56:39 -05:00
per_partition_rate_limit_extension.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
per_partition_rate_limit_info.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
per_partition_rate_limit_options.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
per_partition_rate_limit_options.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
rate_limiter.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
rate_limiter.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
read_context.hh
moved cache files to db
2025-02-04 12:21:31 +03:00
read_repair_decision.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
row_cache.cc
moved cache files to db
2025-02-04 12:21:31 +03:00
row_cache.hh
moved cache files to db
2025-02-04 12:21:31 +03:00
schema_applier.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
schema_applier.hh
treewide: use angle brackets when including seastar headers
2024-12-20 16:16:28 +02:00
schema_features.hh
everywhere: add skeletal support for the in_memory_tables feature
2025-01-20 16:55:17 +02:00
schema_tables.cc
everywhere: add skeletal support for the in_memory_tables feature
2025-01-20 16:55:17 +02:00
schema_tables.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
size_estimates_virtual_reader.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
size_estimates_virtual_reader.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
snapshot-ctl.cc
backup_task: remove a component once it is uploaded
2025-01-22 11:17:01 +08:00
snapshot-ctl.hh
backup_task: remove a component once it is uploaded
2025-01-22 11:17:01 +08:00
sstables-format-selector.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
sstables-format-selector.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
system_distributed_keyspace.cc
qos: use the shares field in service level reads/writes
2025-01-02 07:13:34 +01:00
system_distributed_keyspace.hh
db/system_distributed_keyspace: add shares column and upgrade code
2025-01-02 07:13:34 +01:00
system_keyspace_sstables_registry.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
system_keyspace_view_types.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
system_keyspace.cc
locator: topology: drop is_me ip overload along with remaning users
2025-01-16 16:37:06 +02:00
system_keyspace.hh
Merge 'node_ops: filter topology_requests entries shown by node_ops_virtual_task' from Aleksandra Martyniuk
2025-01-07 14:17:01 +02:00
timeout_clock.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
virtual_table.cc
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
virtual_table.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
virtual_tables.cc
utils: config_file: forward_declare boost::program_options classes
2025-01-27 10:45:43 +03:00
virtual_tables.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00
write_type.hh
treewide: relicense to ScyllaDB-Source-Available-1.0
2024-12-18 17:45:13 +02:00