2024/07/24-00:00:58.299924 140030649099840 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00: fork to child time = 0.011559 sec 2024/07/24-00:00:58.300561 140030649099840 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00 2024/07/24-00:00:58.304853 140030649099840 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00 2024/07/24-00:00:58.308456 140030649099840 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/07/24-00:00:58.308704 140030649099840 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/07/24-00:00:58.345813 140030649099840 [version_set.cc:6139] Recovering from manifest file: /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-07-23T15.41.52/.rocksdb/job-13388/att-00/MANIFEST-13366722 2024/07/24-00:00:58.359788 140030649099840 [version_set.cc:6182] Recovered from manifest file:/worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-07-23T15.41.52/.rocksdb/job-13388/att-00/MANIFEST-13366722 succeeded,manifest_file_number is 13366722, next_file_number is 13382563, last_sequence is 163502278705, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 13382525 2024/07/24-00:00:58.359796 140030649099840 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/07/24-00:00:58.359855 140030649099840 [version_set.cc:5652] Creating manifest 13382563 2024/07/24-00:00:58.386154 140030649099840 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00: bottommost_level: fake = 1, rpc = 0 2024/07/24-00:00:58.399515 140030649099840 [compaction_job.cc:2433] [default] [JOB 13388] Compacting 1@2 + 2@3 files to L3, score 0.95, subcompactions 1 : 1 2024/07/24-00:00:58.399527 140030649099840 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 7088 Base level 2, inputs: [13382537(16MB)], [13382470(97MB) 13382471(6420KB)] 2024/07/24-00:00:58.586710 140030649099840 [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 2024/07/24-00:00:58.586736 140030649099840 [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 2024/07/24-00:00:58.586757 140030649099840 [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 2024/07/24-00:00:58.586771 140030649099840 [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 2024/07/24-00:00:58.586783 140030649099840 [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 2024/07/24-00:00:59.848124 140030649099840 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382564.sst) /dev/shm/ToplingTemp/Topling-15853-uX6NWX 2024/07/24-00:01:00.299754 140030649099840 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382564.sst): first pass time = 0.45's, 297.218'MB/sec 2024/07/24-00:01:04.280725 140030649099840 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382564.sst): old prealloc_size = 139394312, real_size = 100375584 2024/07/24-00:01:04.280928 140030649099840 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382564.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197656 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.97 raw-val = 0.1295 GB zip-val = 0.0999 GB avg-val = 655.05 avg-zval = 505.61 2024/07/24-00:01:04.281184 140030649099840 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382564.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/07/24-00:01:04.737420 140030649099840 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382564.sst): second pass time = 3.98's, 32.531'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.46's, 224.140'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2172.431'MB/sec (index lex order gen) rebuild zvType time = 0.35's, 0.143'MB/sec write SST data time = 0.11's, 921.858'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.345'MB, throughput = 32206.277'MB/sec zip my value time = 3.98's, unzip length = 0.129'GB zip my value throughput = 32.531'MB/sec zip pipeline throughput = 140.429'MB/sec entries = 197656 avg-key = 24.00 avg-zkey = 1.97 avg-val = 655.05 avg-zval = 505.61 usrkeys = 197656 avg-key = 16.00 avg-zkey = 1.97 avg-val = 662.05 avg-zval = 505.61 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197656 bytes = 691808 } seq expand size = 1383592 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0032 GB value = 0.1295 GB dict = 1.35 MB all = 0.1342 GB } __ZipSize{ index = 0.0004 GB value = 0.0999 GB dict = 1.35 MB all = 0.1024 GB } UnZip/Zip{ index = 8.1166 value = 1.2956 dict = 1.00 all = 1.3112 } Zip/UnZip{ index = 0.1232 value = 0.7719 dict = 1.00 all = 0.7627 } ---------------------------- total value len = 0.130858 GB avg = 0.662 KB (by entry num) total key len = 0.004744 GB avg = 0.024 KB total ukey len = 0.003162 GB avg = 0.016 KB total ukey num = 0.000197656 Billion total entry num = 0.000197656 Billion write speed all = 0.043775832 MB/sec (with seq num) write speed all = 0.043265363 MB/sec (without seq num) 2024/07/24-00:01:04.890049 140030649099840 [compaction_job.cc:1944] [default] [JOB 13388] Generated table #13382564: 197656 keys, 102366257 bytes, temperature: kWarm 2024/07/24-00:01:04.890164 140030649099840 EVENT_LOG_v1 {"time_micros": 1721750464890106, "cf_name": "default", "job": 13388, "event": "table_file_creation", "file_number": 13382564, "file_size": 102366257, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 163348439644, "largest_seqno": 163502216407, "table_properties": {"data_size": 99936336, "index_size": 389632, "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": 4743744, "raw_average_key_size": 24, "raw_value_size": 129474335, "raw_average_value_size": 655, "num_data_blocks": 1, "num_entries": 197656, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 24, "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": 1721750459, "oldest_key_time": 0, "file_creation_time": 1721750459, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "FDMKK73D6HWPO0XETTGC", "orig_file_number": 13382564, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/07/24-00:01:04.959047 140030649099840 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382565.sst) /dev/shm/ToplingTemp/Topling-15853-NHRwTU 2024/07/24-00:01:05.081129 140030649099840 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382565.sst): first pass time = 0.12's, 91.126'MB/sec 2024/07/24-00:01:05.414347 140030649099840 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382565.sst): old prealloc_size = 139394312, real_size = 8503584 2024/07/24-00:01:05.414424 140030649099840 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382565.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 16384 prefix = 4 raw-key = 0.0002 GB zip-key = 0.0000 GB avg-key = 12.00 avg-zkey = 2.14 raw-val = 0.0107 GB zip-val = 0.0085 GB avg-val = 654.73 avg-zval = 516.61 2024/07/24-00:01:05.414490 140030649099840 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382565.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0000 GB, waited 0.000 sec, Key+Value = 0.011 GB 2024/07/24-00:01:05.471488 140030649099840 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00/13382565.sst): second pass time = 0.33's, 32.279'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.06's, 151.601'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 728.012'MB/sec (index lex order gen) rebuild zvType time = 0.04's, 0.095'MB/sec write SST data time = 0.01's, 610.395'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.106'MB, throughput = 3502.706'MB/sec zip my value time = 0.33's, unzip length = 0.011'GB zip my value throughput = 32.279'MB/sec zip pipeline throughput = 164.305'MB/sec entries = 16384 avg-key = 24.00 avg-zkey = 2.14 avg-val = 654.73 avg-zval = 516.61 usrkeys = 16384 avg-key = 16.00 avg-zkey = 2.14 avg-val = 661.73 avg-zval = 516.61 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 16384 bytes = 53264 } seq expand size = 114688 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0003 GB value = 0.0107 GB dict = 0.11 MB all = 0.0111 GB } __ZipSize{ index = 0.0000 GB value = 0.0085 GB dict = 0.11 MB all = 0.0087 GB } UnZip/Zip{ index = 7.4745 value = 1.2674 dict = 1.00 all = 1.2841 } Zip/UnZip{ index = 0.1338 value = 0.7890 dict = 1.00 all = 0.7788 } ---------------------------- total value len = 0.141700 GB avg = 0.662 KB (by entry num) total key len = 0.005137 GB avg = 0.024 KB total ukey len = 0.003425 GB avg = 0.016 KB total ukey num = 0.000214040 Billion total entry num = 0.000214040 Billion write speed all = 0.047391580 MB/sec (with seq num) write speed all = 0.046838929 MB/sec (without seq num) 2024/07/24-00:01:05.493474 140030649099840 [compaction_job.cc:1944] [default] [JOB 13388] Generated table #13382565: 16384 keys, 8660208 bytes, temperature: kWarm 2024/07/24-00:01:05.493553 140030649099840 EVENT_LOG_v1 {"time_micros": 1721750465493510, "cf_name": "default", "job": 13388, "event": "table_file_creation", "file_number": 13382565, "file_size": 8660208, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 163448672655, "largest_seqno": 163502216371, "table_properties": {"data_size": 8464208, "index_size": 35072, "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": 393216, "raw_average_key_size": 24, "raw_value_size": 10727162, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 16384, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 24, "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": 1721750464, "oldest_key_time": 0, "file_creation_time": 1721750464, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "FDMKK73D6HWPO0XETTGC", "orig_file_number": 13382565, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/07/24-00:01:05.502148 140030649099840 [compaction_job.cc:699] job-13388: subcompact[0], size: 0.111026 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-13388/att-00 [13382564,13382565] 2024/07/24-00:01:05.542220 140030649099840 (Original Log Time 2024/07/24-00:00:58.399574) EVENT_LOG_v1 {"time_micros": 1721750458399539, "job": 13388, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [13382537], "files_L3": [13382470, 13382471], "score": 0.95291, "input_data_size": 126722102, "oldest_snapshot_seqno": 163502277769} 2024/07/24-00:01:05.542226 140030649099840 (Original Log Time 2024/07/24-00:01:05.541754) [compaction_job.cc:2018] [default] [JOB 13388] Compacted 1@2 + 2@3 files to L3 => 111026465 bytes 2024/07/24-00:01:05.542228 140030649099840 (Original Log Time 2024/07/24-00:01:05.542136) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 17.8 rd, 15.6 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(17.0, 103.9 +0.0 blob) out(105.9 +0.0 blob), read-write-amplify(13.4) write-amplify(6.2) OK, records in: 235960, records dropped: 21920 output_compression: Snappy 2024/07/24-00:01:05.542239 140030649099840 (Original Log Time 2024/07/24-00:01:05.542194) EVENT_LOG_v1 {"time_micros": 1721750465542170, "cf": "default", "job": 13388, "event": "compaction_finished", "compaction_time_micros": 7102588, "compaction_time_cpu_micros": 889202, "output_level": 3, "num_output_files": 2, "total_output_size": 111026465, "num_input_records": 235960, "num_output_records": 214040, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 98526940, "file_range_sync_nanos": 0, "file_fsync_nanos": 1925, "file_prepare_write_nanos": 5799, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/07/24-00:01:05.690305 140030649099840 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":1721720512,"starts":1721750458,"executesMs":7233,"compactionJobId":13388,"attempt":0,"compactionInputRawBytes":160216888,"compactionInputZipBytes":126722102,"compactionOutputRawBytes":0,"compactionOutputZipBytes":111026465,"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":"00-56f9bcff5a4b47dfc2eed1a8bc65a16e-5d8fea260bf9b4a1-00"}}, response = 2024/07/24-00:01:05.690394 140030649099840 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-07-23T15.41.52/.rocksdb/job-13388/att-00: olev 3, work 7.233 s, result 8.157 ms, install 0.515 ms, input{raw 152.795 MiB zip 120.852 MiB}