2024/08/20-05:58:11.801047 140500531811904 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00: fork to child time = 0.010251 sec 2024/08/20-05:58:11.802134 140500531811904 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00 2024/08/20-05:58:11.807814 140500531811904 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00 2024/08/20-05:58:11.808131 140500531811904 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-05:58:11.808472 140500531811904 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-05:58:11.857902 140500531811904 [version_set.cc:6139] Recovering from manifest file: /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-11205/att-00/MANIFEST-14629260 2024/08/20-05:58:11.911285 140500531811904 [version_set.cc:6182] Recovered from manifest file:/worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-11205/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14642023, last_sequence is 190069975231, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14641807 2024/08/20-05:58:11.911294 140500531811904 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-05:58:11.911362 140500531811904 [version_set.cc:5652] Creating manifest 14642023 2024/08/20-05:58:11.990103 140500531811904 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-05:58:12.009584 140500531811904 [compaction_job.cc:2433] [default] [JOB 11205] Compacting 2@2 + 1@3 files to L3, score 1.05, subcompactions 1 : 1 2024/08/20-05:58:12.009597 140500531811904 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 5812 Base level 2, inputs: [14641942(20MB) 14641943(4728KB)], [14641517(40MB)] 2024/08/20-05:58:12.014998 140500531811904 [top_zip_table.cc:59] core git_version_hash_info_is:commit 7517bad5c1a147474c3830831b9a22c996321ae8 Author: leipeng Date: 2024-01-08 19:18:17 +0800 vfork_cmd: call close before wait_finish g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. INCS = -Isrc -I3rdparty/re2 -I3rdparty/zstd -Iboost-include CXXFLAGS = -D TOPLING_IO_WITH_URING=1 -fPIC -time -Wno-class-memaccess -fdiagnostics-color -Wformat=2 -Wcomment -Wall -Wextra -Wno-unused-parameter -Wno-alloc-size-larger-than -mcx16 -Wno-deprecated-declarations -Wstrict-aliasing=3 -DCLIENT_LICENSE_ID="public" -DNO_THREADS -ftls-model=initial-exec -DDIVSUFSORT_API= -fno-stack-protector RLS_FLAGS = -O3 -DNDEBUG -g3 WITH_BMI2 = 1 compile_cpu_flag: -march=haswell -mbmi -mbmi2 2024/08/20-05:58:12.015040 140500531811904 [top_zip_table.cc:60] fsa git_version_hash_info_is:commit 7517bad5c1a147474c3830831b9a22c996321ae8 Author: leipeng Date: 2024-01-08 19:18:17 +0800 vfork_cmd: call close before wait_finish g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. INCS = -Isrc -I3rdparty/re2 -I3rdparty/zstd -Iboost-include CXXFLAGS = -D TOPLING_IO_WITH_URING=1 -fPIC -time -Wno-class-memaccess -fdiagnostics-color -Wformat=2 -Wcomment -Wall -Wextra -Wno-unused-parameter -Wno-alloc-size-larger-than -mcx16 -Wno-deprecated-declarations -Wstrict-aliasing=3 -DCLIENT_LICENSE_ID="public" -DNO_THREADS -ftls-model=initial-exec -DDIVSUFSORT_API= -fno-stack-protector RLS_FLAGS = -O3 -DNDEBUG -g3 WITH_BMI2 = 1 compile_cpu_flag: -march=haswell -mbmi -mbmi2 2024/08/20-05:58:12.015062 140500531811904 [top_zip_table.cc:61] zbs git_version_hash_info_is:commit 7517bad5c1a147474c3830831b9a22c996321ae8 Author: leipeng Date: 2024-01-08 19:18:17 +0800 vfork_cmd: call close before wait_finish g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. INCS = -Isrc -I3rdparty/re2 -I3rdparty/zstd -Iboost-include CXXFLAGS = -D TOPLING_IO_WITH_URING=1 -fPIC -time -Wno-class-memaccess -fdiagnostics-color -Wformat=2 -Wcomment -Wall -Wextra -Wno-unused-parameter -Wno-alloc-size-larger-than -mcx16 -Wno-deprecated-declarations -Wstrict-aliasing=3 -DCLIENT_LICENSE_ID="public" -DNO_THREADS -ftls-model=initial-exec -DDIVSUFSORT_API= -fno-stack-protector RLS_FLAGS = -O3 -DNDEBUG -g3 WITH_BMI2 = 1 compile_cpu_flag: -march=haswell -mbmi -mbmi2 2024/08/20-05:58:12.015076 140500531811904 [top_zip_table.cc:62] topling-zip_table_reader: git_version_hash_info_is: commit 7f80399bfbd2071b6e0f5683e8ab7225b8e6e394 Author: leipeng Date: 2024-01-19 14:52:30 +0800 Change ToplingZipTableOptions::sampleRatio to vector g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. cpu_flag: -march=native -mbmi -mbmi2 2024/08/20-05:58:12.015084 140500531811904 [top_zip_table.cc:64] topling-rocks git_version_hash_info_is: commit 1240987ca13d0fe562c9b9c037155079f0877840 Author: leipeng Date: 2024-01-19 15:07:04 +0800 Change ToplingZipTableOptions::sampleRatio to vector g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. cpu_flag: -march=native -mbmi -mbmi2 2024/08/20-05:58:12.459207 140500531811904 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642024.sst) /dev/shm/ToplingTemp/Topling-205623-wWXOur 2024/08/20-05:58:13.011491 140500531811904 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642024.sst): first pass time = 0.55's, 243.048'MB/sec 2024/08/20-05:58:14.996838 140500531811904 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642024.sst): old prealloc_size = 75593503, real_size = 37536896 2024/08/20-05:58:14.997530 140500531811904 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642024.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 931598 prefix = 4 raw-key = 0.0149 GB zip-key = 0.0018 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.1081 GB zip-val = 0.0355 GB avg-val = 116.07 avg-zval = 38.13 2024/08/20-05:58:14.998409 140500531811904 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642024.sst: sumWaitingMem = 0.002 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0023 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-05:58:15.789554 140500531811904 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642024.sst): second pass time = 1.98's, 54.582'MB/sec, value only(80.6% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.79's, 52.396'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2669.140'MB/sec (index lex order gen) rebuild zvType time = 0.62's, 0.373'MB/sec write SST data time = 0.17's, 246.665'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.078'MB, throughput = 25978.072'MB/sec zip my value time = 1.98's, unzip length = 0.108'GB zip my value throughput = 54.582'MB/sec zip pipeline throughput = 84.656'MB/sec entries = 931598 avg-key = 28.00 avg-zkey = 1.92 avg-val = 116.07 avg-zval = 38.13 usrkeys = 931598 avg-key = 20.00 avg-zkey = 1.92 avg-val = 123.07 avg-zval = 38.13 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 931598 bytes = 3144160 } seq expand size = 6521186 multi value expand size = 0 cnt WriteAppend = 14 UnZipSize{ index = 0.0186 GB value = 0.1081 GB dict = 1.08 MB all = 0.1342 GB } __ZipSize{ index = 0.0018 GB value = 0.0355 GB dict = 1.08 MB all = 0.0415 GB } UnZip/Zip{ index = 10.4432 value = 3.0443 dict = 1.00 all = 3.2314 } Zip/UnZip{ index = 0.0958 value = 0.3285 dict = 1.00 all = 0.3095 } ---------------------------- total value len = 62.411404 GB avg = 0.180 KB (by entry num) total key len = 6.814842 GB avg = 0.020 KB total ukey len = 3.208139 GB avg = 0.008 KB total ukey num = 0.390265159 Billion total entry num = 0.347143167 Billion write speed all = 1.550260587 MB/sec (with seq num) write speed all = 1.488068873 MB/sec (without seq num) 2024/08/20-05:58:15.842139 140500531811904 [compaction_job.cc:1944] [default] [JOB 11205] Generated table #14642024: 931598 keys, 41535835 bytes, temperature: kWarm 2024/08/20-05:58:15.842225 140500531811904 EVENT_LOG_v1 {"time_micros": 1724104695842178, "cf_name": "default", "job": 11205, "event": "table_file_creation", "file_number": 14642024, "file_size": 41535835, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189974435356, "largest_seqno": 190067892751, "table_properties": {"data_size": 35519664, "index_size": 1784128, "index_partitions": 0, "top_level_index_size": 0, "index_key_is_user_key": 0, "index_value_is_delta_encoded": 0, "filter_size": 0, "raw_key_size": 26084744, "raw_average_key_size": 28, "raw_value_size": 108133020, "raw_average_value_size": 116, "num_data_blocks": 1, "num_entries": 931598, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 28, "fixed_value_len": 18446744073709551615, "filter_policy": "", "column_family_name": "default", "column_family_id": 0, "comparator": "leveldb.BytewiseComparator", "merge_operator": "nullptr", "prefix_extractor_name": "nullptr", "property_collectors": "[Rdb_tbl_prop_coll_factory]", "compression": "FlatZip", "compression_options": "RS_Key0_Tag1-NestLoudsTrieDAWG_Mixed_XL_256_32_FL-DictZipBlobStore", "creation_time": 1724104692, "oldest_key_time": 0, "file_creation_time": 1724104692, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "90ZT1ZM5QNL093I8HHQG", "orig_file_number": 14642024, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-05:58:15.879048 140500531811904 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642025.sst) /dev/shm/ToplingTemp/Topling-205623-6p9vrr 2024/08/20-05:58:16.224838 140500531811904 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642025.sst): first pass time = 0.35's, 217.736'MB/sec 2024/08/20-05:58:17.190245 140500531811904 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642025.sst): old prealloc_size = 75593503, real_size = 22039856 2024/08/20-05:58:17.190702 140500531811904 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642025.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 521941 prefix = 4 raw-key = 0.0084 GB zip-key = 0.0010 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.0607 GB zip-val = 0.0209 GB avg-val = 116.23 avg-zval = 40.06 2024/08/20-05:58:17.191239 140500531811904 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642025.sst: sumWaitingMem = 0.001 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0012 GB, waited 0.000 sec, Key+Value = 0.075 GB 2024/08/20-05:58:17.704258 140500531811904 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00/14642025.sst): second pass time = 0.96's, 62.902'MB/sec, value only(80.6% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.51's, 47.366'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2314.677'MB/sec (index lex order gen) rebuild zvType time = 0.42's, 0.307'MB/sec write SST data time = 0.09's, 274.308'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.607'MB, throughput = 12567.083'MB/sec zip my value time = 0.96's, unzip length = 0.061'GB zip my value throughput = 62.902'MB/sec zip pipeline throughput = 96.075'MB/sec entries = 521941 avg-key = 28.00 avg-zkey = 1.92 avg-val = 116.23 avg-zval = 40.06 usrkeys = 521941 avg-key = 20.00 avg-zkey = 1.92 avg-val = 123.23 avg-zval = 40.06 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 521941 bytes = 1826816 } seq expand size = 3653587 multi value expand size = 0 cnt WriteAppend = 15 UnZipSize{ index = 0.0104 GB value = 0.0607 GB dict = 0.61 MB all = 0.0753 GB } __ZipSize{ index = 0.0010 GB value = 0.0209 GB dict = 0.61 MB all = 0.0243 GB } UnZip/Zip{ index = 10.4335 value = 2.9014 dict = 1.00 all = 3.0919 } Zip/UnZip{ index = 0.0958 value = 0.3447 dict = 1.00 all = 0.3234 } ---------------------------- total value len = 62.475722 GB avg = 0.180 KB (by entry num) total key len = 6.829457 GB avg = 0.020 KB total ukey len = 3.218578 GB avg = 0.008 KB total ukey num = 0.390787100 Billion total entry num = 0.347665108 Billion write speed all = 1.551961672 MB/sec (with seq num) write speed all = 1.489679121 MB/sec (without seq num) 2024/08/20-05:58:17.735442 140500531811904 [compaction_job.cc:1944] [default] [JOB 11205] Generated table #14642025: 521941 keys, 24347390 bytes, temperature: kWarm 2024/08/20-05:58:17.735513 140500531811904 EVENT_LOG_v1 {"time_micros": 1724104697735479, "cf_name": "default", "job": 11205, "event": "table_file_creation", "file_number": 14642025, "file_size": 24347390, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189848853056, "largest_seqno": 190067893035, "table_properties": {"data_size": 20908704, "index_size": 1000512, "index_partitions": 0, "top_level_index_size": 0, "index_key_is_user_key": 0, "index_value_is_delta_encoded": 0, "filter_size": 0, "raw_key_size": 14614348, "raw_average_key_size": 28, "raw_value_size": 60664874, "raw_average_value_size": 116, "num_data_blocks": 1, "num_entries": 521941, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 28, "fixed_value_len": 18446744073709551615, "filter_policy": "", "column_family_name": "default", "column_family_id": 0, "comparator": "leveldb.BytewiseComparator", "merge_operator": "nullptr", "prefix_extractor_name": "nullptr", "property_collectors": "[Rdb_tbl_prop_coll_factory]", "compression": "FlatZip", "compression_options": "RS_Key0_Tag1-NestLoudsTrieDAWG_Mixed_XL_256_32_FL-DictZipBlobStore", "creation_time": 1724104695, "oldest_key_time": 0, "file_creation_time": 1724104695, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "90ZT1ZM5QNL093I8HHQG", "orig_file_number": 14642025, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-05:58:17.752930 140500531811904 [compaction_job.cc:699] job-11205: subcompact[0], size: 0.065883 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-11205/att-00 [14642024,14642025] 2024/08/20-05:58:17.774336 140500531811904 (Original Log Time 2024/08/20-05:58:12.009661) EVENT_LOG_v1 {"time_micros": 1724104692009610, "job": 11205, "event": "compaction_started", "compaction_reason": "LevelMaxLevelSize", "files_L2": [14641942, 14641943], "files_L3": [14641517], "score": 1.05164, "input_data_size": 68721367, "oldest_snapshot_seqno": 190069974747} 2024/08/20-05:58:17.774340 140500531811904 (Original Log Time 2024/08/20-05:58:17.771199) [compaction_job.cc:2018] [default] [JOB 11205] Compacted 2@2 + 1@3 files to L3 => 65883225 bytes 2024/08/20-05:58:17.774341 140500531811904 (Original Log Time 2024/08/20-05:58:17.774266) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 12.0 rd, 11.5 wr, level 3, files in(2, 1) out(2 +0 blob) MB in(25.1, 40.5 +0.0 blob) out(62.8 +0.0 blob), read-write-amplify(5.1) write-amplify(2.5) OK, records in: 1496442, records dropped: 42903 output_compression: Snappy 2024/08/20-05:58:17.774349 140500531811904 (Original Log Time 2024/08/20-05:58:17.774312) EVENT_LOG_v1 {"time_micros": 1724104697774292, "cf": "default", "job": 11205, "event": "compaction_finished", "compaction_time_micros": 5743282, "compaction_time_cpu_micros": 2177487, "output_level": 3, "num_output_files": 2, "total_output_size": 65883225, "num_input_records": 1496442, "num_output_records": 1453539, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 41693704, "file_range_sync_nanos": 0, "file_fsync_nanos": 1285, "file_prepare_write_nanos": 6951, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-05:58:17.906287 140500531811904 DEBG dcompact_worker.cpp:240: HttpPost: 200 OK: url = http://nlb-7zny4kaa1poal01o64.cn-shenzhen.nlb.aliyuncs.com:8443, body = {"instanceId":"nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137","labourId":"","dbId":"a007a635-5c0a-4b4a-be96-b9c695cb016b","dbStarts":1724092920,"starts":1724104691,"executesMs":5965,"compactionJobId":11205,"attempt":0,"compactionInputRawBytes":215589212,"compactionInputZipBytes":68721367,"compactionOutputRawBytes":0,"compactionOutputZipBytes":65883225,"headers":{"Accept":"*/*","Connection":"close","Host":"aliyun-topling-saas.topling.cn:18443","RemoteIp":"120.24.192.169","X-Forwarded-For":"120.24.192.169","region":"cn-shenzhen","token":"e6474c481bd4415abc537135cc03626b","instance-token":"e6474c481bd4415abc537135cc03626b","provider":"aliyun","CloudMarketInstanceId":"si-59c0ae5c955845588903","MeteringAssit":"","Transfer-Encoding":"chunked","traceparent":"00-057850162fe9cca80b0368758c996c75-7125c77867b0beb1-00"}}, response = 2024/08/20-05:58:17.906398 140500531811904 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-11205/att-00: olev 3, work 5.965 s, result 4.827 ms, install 3.172 ms, input{raw 205.602 MiB zip 65.538 MiB}