2026/01/16-13:39:57.150736 1 RocksDB version: 7.8.3
2026/01/16-13:39:57.150855 1 Git sha 0
2026/01/16-13:39:57.150857 1 Compile date 2024-02-19 22:37:42
2026/01/16-13:39:57.150857 1 DB SUMMARY
2026/01/16-13:39:57.150858 1 DB Session ID:  7XMN0685OMFPH5W5BU5V
2026/01/16-13:39:57.155648 1 CURRENT file:  CURRENT
2026/01/16-13:39:57.155655 1 IDENTITY file:  IDENTITY
2026/01/16-13:39:57.155789 1 MANIFEST file:  MANIFEST-000005 size: 59 Bytes
2026/01/16-13:39:57.155793 1 SST files in /data/meta dir, Total Num: 0, files: 
2026/01/16-13:39:57.155795 1 Write Ahead Log file in /data/meta: 000004.log size: 0 ; 
2026/01/16-13:39:57.155797 1                         Options.error_if_exists: 0
2026/01/16-13:39:57.155804 1                       Options.create_if_missing: 1
2026/01/16-13:39:57.155805 1                         Options.paranoid_checks: 1
2026/01/16-13:39:57.155806 1             Options.flush_verify_memtable_count: 1
2026/01/16-13:39:57.155808 1                               Options.track_and_verify_wals_in_manifest: 0
2026/01/16-13:39:57.155809 1        Options.verify_sst_unique_id_in_manifest: 1
2026/01/16-13:39:57.155810 1                                     Options.env: 0xaaaad9c2e720
2026/01/16-13:39:57.155812 1                                      Options.fs: PosixFileSystem
2026/01/16-13:39:57.155813 1                                Options.info_log: 0xffffb5034c00
2026/01/16-13:39:57.155814 1                Options.max_file_opening_threads: 16
2026/01/16-13:39:57.155815 1                              Options.statistics: (nil)
2026/01/16-13:39:57.155816 1                               Options.use_fsync: 0
2026/01/16-13:39:57.155817 1                       Options.max_log_file_size: 4194304
2026/01/16-13:39:57.155818 1                  Options.max_manifest_file_size: 1073741824
2026/01/16-13:39:57.155820 1                   Options.log_file_time_to_roll: 0
2026/01/16-13:39:57.155821 1                       Options.keep_log_file_num: 5
2026/01/16-13:39:57.155822 1                    Options.recycle_log_file_num: 0
2026/01/16-13:39:57.155823 1                         Options.allow_fallocate: 1
2026/01/16-13:39:57.155824 1                        Options.allow_mmap_reads: 0
2026/01/16-13:39:57.155825 1                       Options.allow_mmap_writes: 0
2026/01/16-13:39:57.155826 1                        Options.use_direct_reads: 0
2026/01/16-13:39:57.155826 1                        Options.use_direct_io_for_flush_and_compaction: 0
2026/01/16-13:39:57.155827 1          Options.create_missing_column_families: 0
2026/01/16-13:39:57.155828 1                              Options.db_log_dir: 
2026/01/16-13:39:57.155829 1                                 Options.wal_dir: 
2026/01/16-13:39:57.155830 1                Options.table_cache_numshardbits: 6
2026/01/16-13:39:57.155831 1                         Options.WAL_ttl_seconds: 86400
2026/01/16-13:39:57.155832 1                       Options.WAL_size_limit_MB: 1024
2026/01/16-13:39:57.155833 1                        Options.max_write_batch_group_size_bytes: 1048576
2026/01/16-13:39:57.155834 1             Options.manifest_preallocation_size: 4194304
2026/01/16-13:39:57.155835 1                     Options.is_fd_close_on_exec: 1
2026/01/16-13:39:57.155836 1                   Options.advise_random_on_open: 1
2026/01/16-13:39:57.155837 1                    Options.db_write_buffer_size: 0
2026/01/16-13:39:57.155838 1                    Options.write_buffer_manager: 0xffffb501aa40
2026/01/16-13:39:57.155839 1         Options.access_hint_on_compaction_start: 1
2026/01/16-13:39:57.155840 1           Options.random_access_max_buffer_size: 1048576
2026/01/16-13:39:57.155841 1                      Options.use_adaptive_mutex: 0
2026/01/16-13:39:57.155842 1                            Options.rate_limiter: (nil)
2026/01/16-13:39:57.155844 1     Options.sst_file_manager.rate_bytes_per_sec: 0
2026/01/16-13:39:57.155844 1                       Options.wal_recovery_mode: 2
2026/01/16-13:39:57.155845 1                  Options.enable_thread_tracking: 0
2026/01/16-13:39:57.155846 1                  Options.enable_pipelined_write: 0
2026/01/16-13:39:57.155847 1                  Options.unordered_write: 0
2026/01/16-13:39:57.155848 1         Options.allow_concurrent_memtable_write: 1
2026/01/16-13:39:57.155868 1      Options.enable_write_thread_adaptive_yield: 1
2026/01/16-13:39:57.155869 1             Options.write_thread_max_yield_usec: 100
2026/01/16-13:39:57.155870 1            Options.write_thread_slow_yield_usec: 3
2026/01/16-13:39:57.155871 1                               Options.row_cache: None
2026/01/16-13:39:57.155872 1                              Options.wal_filter: None
2026/01/16-13:39:57.155873 1             Options.avoid_flush_during_recovery: 0
2026/01/16-13:39:57.155874 1             Options.allow_ingest_behind: 0
2026/01/16-13:39:57.155875 1             Options.two_write_queues: 0
2026/01/16-13:39:57.155875 1             Options.manual_wal_flush: 0
2026/01/16-13:39:57.155876 1             Options.wal_compression: 0
2026/01/16-13:39:57.155877 1             Options.atomic_flush: 0
2026/01/16-13:39:57.155878 1             Options.avoid_unnecessary_blocking_io: 0
2026/01/16-13:39:57.155879 1                 Options.persist_stats_to_disk: 0
2026/01/16-13:39:57.155880 1                 Options.write_dbid_to_manifest: 0
2026/01/16-13:39:57.155881 1                 Options.log_readahead_size: 0
2026/01/16-13:39:57.155882 1                 Options.file_checksum_gen_factory: Unknown
2026/01/16-13:39:57.155883 1                 Options.best_efforts_recovery: 0
2026/01/16-13:39:57.155884 1                Options.max_bgerror_resume_count: 2147483647
2026/01/16-13:39:57.155885 1            Options.bgerror_resume_retry_interval: 1000000
2026/01/16-13:39:57.155885 1             Options.allow_data_in_errors: 0
2026/01/16-13:39:57.155886 1             Options.db_host_id: __hostname__
2026/01/16-13:39:57.155887 1             Options.enforce_single_del_contracts: true
2026/01/16-13:39:57.155888 1             Options.max_background_jobs: 16
2026/01/16-13:39:57.155889 1             Options.max_background_compactions: -1
2026/01/16-13:39:57.155890 1             Options.max_subcompactions: 1
2026/01/16-13:39:57.155891 1             Options.avoid_flush_during_shutdown: 0
2026/01/16-13:39:57.155892 1           Options.writable_file_max_buffer_size: 1048576
2026/01/16-13:39:57.155893 1             Options.delayed_write_rate : 16777216
2026/01/16-13:39:57.155893 1             Options.max_total_wal_size: 0
2026/01/16-13:39:57.155894 1             Options.delete_obsolete_files_period_micros: 21600000000
2026/01/16-13:39:57.155895 1                   Options.stats_dump_period_sec: 600
2026/01/16-13:39:57.155896 1                 Options.stats_persist_period_sec: 600
2026/01/16-13:39:57.155897 1                 Options.stats_history_buffer_size: 1048576
2026/01/16-13:39:57.155898 1                          Options.max_open_files: -1
2026/01/16-13:39:57.155903 1                          Options.bytes_per_sync: 0
2026/01/16-13:39:57.155904 1                      Options.wal_bytes_per_sync: 0
2026/01/16-13:39:57.155904 1                   Options.strict_bytes_per_sync: 0
2026/01/16-13:39:57.155905 1       Options.compaction_readahead_size: 0
2026/01/16-13:39:57.155906 1                  Options.max_background_flushes: -1
2026/01/16-13:39:57.155907 1 Compression algorithms supported:
2026/01/16-13:39:57.155909 1 	kZSTDNotFinalCompression supported: 0
2026/01/16-13:39:57.155910 1 	kZSTD supported: 0
2026/01/16-13:39:57.155911 1 	kXpressCompression supported: 0
2026/01/16-13:39:57.155912 1 	kLZ4HCCompression supported: 0
2026/01/16-13:39:57.155913 1 	kLZ4Compression supported: 0
2026/01/16-13:39:57.155914 1 	kBZip2Compression supported: 0
2026/01/16-13:39:57.155915 1 	kZlibCompression supported: 0
2026/01/16-13:39:57.155916 1 	kSnappyCompression supported: 1
2026/01/16-13:39:57.155918 1 Fast CRC32 supported: Not supported on Arm64
2026/01/16-13:39:57.155919 1 DMutex implementation: pthread_mutex_t
2026/01/16-13:39:57.158839 1 [db/version_set.cc:5536] Recovering from manifest file: /data/meta/MANIFEST-000005
2026/01/16-13:39:57.159136 1 [db/column_family.cc:630] --------------- Options for column family [default]:
2026/01/16-13:39:57.159143 1               Options.comparator: leveldb.BytewiseComparator
2026/01/16-13:39:57.159152 1           Options.merge_operator: UInt64AddOperator
2026/01/16-13:39:57.159156 1        Options.compaction_filter: None
2026/01/16-13:39:57.159157 1        Options.compaction_filter_factory: None
2026/01/16-13:39:57.159158 1  Options.sst_partitioner_factory: None
2026/01/16-13:39:57.159158 1         Options.memtable_factory: SkipListFactory
2026/01/16-13:39:57.159159 1            Options.table_factory: BlockBasedTable
2026/01/16-13:39:57.159183 1            table_factory options:   flush_block_policy_factory: FlushBlockBySizePolicyFactory (0xffffb4b28dc0)
  cache_index_and_filter_blocks: 0
  cache_index_and_filter_blocks_with_high_priority: 1
  pin_l0_filter_and_index_blocks_in_cache: 0
  pin_top_level_index_and_filter: 1
  index_type: 0
  data_block_index_type: 0
  index_shortening: 1
  data_block_hash_table_util_ratio: 0.750000
  checksum: 4
  no_block_cache: 0
  block_cache: 0xffffb50664b0
  block_cache_name: LRUCache
  block_cache_options:
    capacity : 8388608
    num_shard_bits : 4
    strict_capacity_limit : 0
    memory_allocator : None
    high_pri_pool_ratio: 0.000
    low_pri_pool_ratio: 0.000
  block_cache_compressed: (nil)
  persistent_cache: (nil)
  block_size: 4096
  block_size_deviation: 10
  block_restart_interval: 16
  index_block_restart_interval: 1
  metadata_block_size: 4096
  partition_filters: 0
  use_delta_encoding: 1
  filter_policy: nullptr
  whole_key_filtering: 1
  verify_compression: 0
  read_amp_bytes_per_bit: 0
  format_version: 5
  enable_index_compression: 1
  block_align: 0
  max_auto_readahead_size: 262144
  prepopulate_block_cache: 0
  initial_auto_readahead_size: 8192
  num_file_reads_for_auto_readahead: 2
2026/01/16-13:39:57.159187 1        Options.write_buffer_size: 4194304
2026/01/16-13:39:57.159188 1  Options.max_write_buffer_number: 2
2026/01/16-13:39:57.159189 1        Options.compression[0]: NoCompression
2026/01/16-13:39:57.159189 1        Options.compression[1]: NoCompression
2026/01/16-13:39:57.159190 1        Options.compression[2]: Snappy
2026/01/16-13:39:57.159191 1        Options.compression[3]: Snappy
2026/01/16-13:39:57.159203 1        Options.compression[4]: Snappy
2026/01/16-13:39:57.159203 1        Options.compression[5]: Snappy
2026/01/16-13:39:57.159204 1        Options.compression[6]: Snappy
2026/01/16-13:39:57.159205 1                  Options.bottommost_compression: Disabled
2026/01/16-13:39:57.159205 1       Options.prefix_extractor: nullptr
2026/01/16-13:39:57.159206 1   Options.memtable_insert_with_hint_prefix_extractor: nullptr
2026/01/16-13:39:57.159206 1             Options.num_levels: 7
2026/01/16-13:39:57.159207 1        Options.min_write_buffer_number_to_merge: 1
2026/01/16-13:39:57.159208 1     Options.max_write_buffer_number_to_maintain: 0
2026/01/16-13:39:57.159208 1     Options.max_write_buffer_size_to_maintain: 0
2026/01/16-13:39:57.159209 1            Options.bottommost_compression_opts.window_bits: -14
2026/01/16-13:39:57.159210 1                  Options.bottommost_compression_opts.level: 32767
2026/01/16-13:39:57.159211 1               Options.bottommost_compression_opts.strategy: 0
2026/01/16-13:39:57.159211 1         Options.bottommost_compression_opts.max_dict_bytes: 0
2026/01/16-13:39:57.159212 1         Options.bottommost_compression_opts.zstd_max_train_bytes: 0
2026/01/16-13:39:57.159213 1         Options.bottommost_compression_opts.parallel_threads: 1
2026/01/16-13:39:57.159213 1                  Options.bottommost_compression_opts.enabled: false
2026/01/16-13:39:57.159214 1         Options.bottommost_compression_opts.max_dict_buffer_bytes: 0
2026/01/16-13:39:57.159215 1         Options.bottommost_compression_opts.use_zstd_dict_trainer: true
2026/01/16-13:39:57.159216 1            Options.compression_opts.window_bits: -14
2026/01/16-13:39:57.159216 1                  Options.compression_opts.level: 32767
2026/01/16-13:39:57.159217 1               Options.compression_opts.strategy: 0
2026/01/16-13:39:57.159218 1         Options.compression_opts.max_dict_bytes: 0
2026/01/16-13:39:57.159218 1         Options.compression_opts.zstd_max_train_bytes: 0
2026/01/16-13:39:57.159219 1         Options.compression_opts.use_zstd_dict_trainer: true
2026/01/16-13:39:57.159219 1         Options.compression_opts.parallel_threads: 1
2026/01/16-13:39:57.159220 1                  Options.compression_opts.enabled: false
2026/01/16-13:39:57.159220 1         Options.compression_opts.max_dict_buffer_bytes: 0
2026/01/16-13:39:57.159221 1      Options.level0_file_num_compaction_trigger: 2
2026/01/16-13:39:57.159222 1          Options.level0_slowdown_writes_trigger: 20
2026/01/16-13:39:57.159222 1              Options.level0_stop_writes_trigger: 36
2026/01/16-13:39:57.159223 1                   Options.target_file_size_base: 67108864
2026/01/16-13:39:57.159223 1             Options.target_file_size_multiplier: 1
2026/01/16-13:39:57.159224 1                Options.max_bytes_for_level_base: 536870912
2026/01/16-13:39:57.159225 1 Options.level_compaction_dynamic_level_bytes: 0
2026/01/16-13:39:57.159226 1          Options.max_bytes_for_level_multiplier: 10.000000
2026/01/16-13:39:57.159226 1 Options.max_bytes_for_level_multiplier_addtl[0]: 1
2026/01/16-13:39:57.159227 1 Options.max_bytes_for_level_multiplier_addtl[1]: 1
2026/01/16-13:39:57.159227 1 Options.max_bytes_for_level_multiplier_addtl[2]: 1
2026/01/16-13:39:57.159228 1 Options.max_bytes_for_level_multiplier_addtl[3]: 1
2026/01/16-13:39:57.159229 1 Options.max_bytes_for_level_multiplier_addtl[4]: 1
2026/01/16-13:39:57.159229 1 Options.max_bytes_for_level_multiplier_addtl[5]: 1
2026/01/16-13:39:57.159230 1 Options.max_bytes_for_level_multiplier_addtl[6]: 1
2026/01/16-13:39:57.159230 1       Options.max_sequential_skip_in_iterations: 8
2026/01/16-13:39:57.159231 1                    Options.max_compaction_bytes: 1677721600
2026/01/16-13:39:57.159231 1   Options.ignore_max_compaction_bytes_for_input: true
2026/01/16-13:39:57.159232 1                        Options.arena_block_size: 524288
2026/01/16-13:39:57.159233 1   Options.soft_pending_compaction_bytes_limit: 68719476736
2026/01/16-13:39:57.159233 1   Options.hard_pending_compaction_bytes_limit: 274877906944
2026/01/16-13:39:57.159234 1                Options.disable_auto_compactions: 0
2026/01/16-13:39:57.159235 1                        Options.compaction_style: kCompactionStyleLevel
2026/01/16-13:39:57.159235 1                          Options.compaction_pri: kMinOverlappingRatio
2026/01/16-13:39:57.159236 1 Options.compaction_options_universal.size_ratio: 1
2026/01/16-13:39:57.159237 1 Options.compaction_options_universal.min_merge_width: 2
2026/01/16-13:39:57.159237 1 Options.compaction_options_universal.max_merge_width: 4294967295
2026/01/16-13:39:57.159238 1 Options.compaction_options_universal.max_size_amplification_percent: 200
2026/01/16-13:39:57.159239 1 Options.compaction_options_universal.compression_size_percent: -1
2026/01/16-13:39:57.159239 1 Options.compaction_options_universal.stop_style: kCompactionStopStyleTotalSize
2026/01/16-13:39:57.159240 1 Options.compaction_options_fifo.max_table_files_size: 1073741824
2026/01/16-13:39:57.159240 1 Options.compaction_options_fifo.allow_compaction: 0
2026/01/16-13:39:57.159245 1                   Options.table_properties_collectors: 
2026/01/16-13:39:57.159246 1                   Options.inplace_update_support: 0
2026/01/16-13:39:57.159246 1                 Options.inplace_update_num_locks: 10000
2026/01/16-13:39:57.159247 1               Options.memtable_prefix_bloom_size_ratio: 0.000000
2026/01/16-13:39:57.159248 1               Options.memtable_whole_key_filtering: 0
2026/01/16-13:39:57.159249 1   Options.memtable_huge_page_size: 0
2026/01/16-13:39:57.159249 1                           Options.bloom_locality: 0
2026/01/16-13:39:57.159250 1                    Options.max_successive_merges: 0
2026/01/16-13:39:57.159250 1                Options.optimize_filters_for_hits: 0
2026/01/16-13:39:57.159251 1                Options.paranoid_file_checks: 0
2026/01/16-13:39:57.159252 1                Options.force_consistency_checks: 1
2026/01/16-13:39:57.159252 1                Options.report_bg_io_stats: 0
2026/01/16-13:39:57.159253 1                               Options.ttl: 2592000
2026/01/16-13:39:57.159253 1          Options.periodic_compaction_seconds: 0
2026/01/16-13:39:57.159254 1  Options.preclude_last_level_data_seconds: 0
2026/01/16-13:39:57.159254 1    Options.preserve_internal_time_seconds: 0
2026/01/16-13:39:57.159255 1                       Options.enable_blob_files: false
2026/01/16-13:39:57.159255 1                           Options.min_blob_size: 0
2026/01/16-13:39:57.159257 1                          Options.blob_file_size: 268435456
2026/01/16-13:39:57.159258 1                   Options.blob_compression_type: NoCompression
2026/01/16-13:39:57.159258 1          Options.enable_blob_garbage_collection: false
2026/01/16-13:39:57.159259 1      Options.blob_garbage_collection_age_cutoff: 0.250000
2026/01/16-13:39:57.159260 1 Options.blob_garbage_collection_force_threshold: 1.000000
2026/01/16-13:39:57.159260 1          Options.blob_compaction_readahead_size: 0
2026/01/16-13:39:57.159261 1                Options.blob_file_starting_level: 0
2026/01/16-13:39:57.159261 1 Options.experimental_mempurge_threshold: 0.000000
2026/01/16-13:39:57.167644 1 [db/version_set.cc:5575] Recovered from manifest file:/data/meta/MANIFEST-000005 succeeded,manifest_file_number is 5, next_file_number is 7, last_sequence is 0, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 0
2026/01/16-13:39:57.167651 1 [db/version_set.cc:5590] Column family [default] (ID 0), log number is 0
2026/01/16-13:39:57.168247 1 [db/db_impl/db_impl_open.cc:538] DB ID: c2822cee-40b9-402f-8cdf-f3ca6fbb8648
2026/01/16-13:39:57.171412 1 EVENT_LOG_v1 {"time_micros": 1768570797171407, "job": 1, "event": "recovery_started", "wal_files": [4]}
2026/01/16-13:39:57.171417 1 [db/db_impl/db_impl_open.cc:1042] Recovering log #4 mode 2
2026/01/16-13:39:57.173024 1 EVENT_LOG_v1 {"time_micros": 1768570797173020, "job": 1, "event": "recovery_finished"}
2026/01/16-13:39:57.174092 1 [db/version_set.cc:5056] Creating manifest 9
2026/01/16-13:39:57.189672 1 [db/db_impl/db_impl_open.cc:1987] SstFileManager instance 0xffffb5064580
2026/01/16-13:39:57.191630 1 DB pointer 0xffffb4bdd800
2026/01/16-13:40:00.193597 287 [db/db_impl/db_impl.cc:1105] ------- DUMPING STATS -------
2026/01/16-13:40:00.193622 287 [db/db_impl/db_impl.cc:1107] 
** DB Stats **
Uptime(secs): 3.0 total, 3.0 interval
Cumulative writes: 0 writes, 0 keys, 0 commit groups, 0.0 writes per commit group, ingest: 0.00 GB, 0.00 MB/s
Cumulative WAL: 0 writes, 0 syncs, 0.00 writes per sync, written: 0.00 GB, 0.00 MB/s
Cumulative stall: 00:00:0.000 H:M:S, 0.0 percent
Interval writes: 0 writes, 0 keys, 0 commit groups, 0.0 writes per commit group, ingest: 0.00 MB, 0.00 MB/s
Interval WAL: 0 writes, 0 syncs, 0.00 writes per sync, written: 0.00 GB, 0.00 MB/s
Interval stall: 00:00:0.000 H:M:S, 0.0 percent

** Compaction Stats [default] **
Level    Files   Size     Score Read(GB)  Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop Rblob(GB) Wblob(GB)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sum      0/0    0.00 KB   0.0      0.0     0.0      0.0       0.0      0.0       0.0   0.0      0.0      0.0      0.00              0.00         0    0.000       0      0       0.0       0.0
 Int      0/0    0.00 KB   0.0      0.0     0.0      0.0       0.0      0.0       0.0   0.0      0.0      0.0      0.00              0.00         0    0.000       0      0       0.0       0.0

** Compaction Stats [default] **
Priority    Files   Size     Score Read(GB)  Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop Rblob(GB) Wblob(GB)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Blob file count: 0, total size: 0.0 GB, garbage size: 0.0 GB, space amp: 0.0

Uptime(secs): 3.0 total, 3.0 interval
Flush(GB): cumulative 0.000, interval 0.000
AddFile(GB): cumulative 0.000, interval 0.000
AddFile(Total Files): cumulative 0, interval 0
AddFile(L0 Files): cumulative 0, interval 0
AddFile(Keys): cumulative 0, interval 0
Cumulative compaction: 0.00 GB write, 0.00 MB/s write, 0.00 GB read, 0.00 MB/s read, 0.0 seconds
Interval compaction: 0.00 GB write, 0.00 MB/s write, 0.00 GB read, 0.00 MB/s read, 0.0 seconds
Stalls(count): 0 level0_slowdown, 0 level0_slowdown_with_compaction, 0 level0_numfiles, 0 level0_numfiles_with_compaction, 0 stop for pending_compaction_bytes, 0 slowdown for pending_compaction_bytes, 0 memtable_compaction, 0 memtable_slowdown, interval 0 total count
Block cache LRUCache@0xffffb50664b0#1 capacity: 8.00 MB usage: 0.09 KB table_size: 256 occupancy: 96 collections: 1 last_copies: 0 last_secs: 3.8e-05 secs_since: 0
Block cache entry stats(count,size,portion): Misc(1,0.00 KB,0%)

** File Read Latency Histogram By Level [default] **
