2024/08/20-04:00:25.265880 140500246459968 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00: fork to child time = 0.054806 sec 2024/08/20-04:00:25.266871 140500246459968 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00 2024/08/20-04:00:25.271651 140500246459968 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00 2024/08/20-04:00:25.273097 140500246459968 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-04:00:25.273394 140500246459968 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-04:00:25.312680 140500246459968 [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-04908/att-00/MANIFEST-14629260 2024/08/20-04:00:25.326671 140500246459968 [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-04908/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14634745, last_sequence is 189908774413, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14634593 2024/08/20-04:00:25.326679 140500246459968 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-04:00:25.326733 140500246459968 [version_set.cc:5652] Creating manifest 14634745 2024/08/20-04:00:25.362592 140500246459968 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-04:00:25.381751 140500246459968 [compaction_job.cc:2433] [default] [JOB 4908] Compacting 1@2 + 2@3 files to L3, score 1.00, subcompactions 1 : 1 2024/08/20-04:00:25.381769 140500246459968 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 2565 Base level 2, inputs: [14634725(21MB)], [14634679(97MB) 14634680(20MB)] 2024/08/20-04:00:25.814917 140500246459968 [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 2024/08/20-04:00:25.814950 140500246459968 [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 2024/08/20-04:00:25.814967 140500246459968 [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 2024/08/20-04:00:25.814986 140500246459968 [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 2024/08/20-04:00:25.814996 140500246459968 [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 2024/08/20-04:00:27.306672 140500246459968 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634746.sst) /dev/shm/ToplingTemp/Topling-155782-pHH8IJ 2024/08/20-04:00:27.894493 140500246459968 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634746.sst): first pass time = 0.59's, 228.353'MB/sec 2024/08/20-04:00:32.601851 140500246459968 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634746.sst): old prealloc_size = 147639500, real_size = 100449488 2024/08/20-04:00:32.602081 140500246459968 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634746.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197739 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.88 raw-val = 0.1295 GB zip-val = 0.1000 GB avg-val = 654.76 avg-zval = 505.86 2024/08/20-04:00:32.602317 140500246459968 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634746.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-04:00:32.998147 140500246459968 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634746.sst): second pass time = 4.71's, 27.518'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.40's, 258.509'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2011.683'MB/sec (index lex order gen) rebuild zvType time = 0.30's, 0.167'MB/sec write SST data time = 0.10's, 1019.046'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.351'MB, throughput = 27518.515'MB/sec zip my value time = 4.71's, unzip length = 0.129'GB zip my value throughput = 27.518'MB/sec zip pipeline throughput = 150.586'MB/sec entries = 197739 avg-key = 24.00 avg-zkey = 1.88 avg-val = 654.76 avg-zval = 505.86 usrkeys = 197739 avg-key = 16.00 avg-zkey = 1.88 avg-val = 661.76 avg-zval = 505.86 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197739 bytes = 692096 } seq expand size = 1384173 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0032 GB value = 0.1295 GB dict = 1.35 MB all = 0.1342 GB } __ZipSize{ index = 0.0004 GB value = 0.1000 GB dict = 1.35 MB all = 0.1024 GB } UnZip/Zip{ index = 8.4910 value = 1.2944 dict = 1.00 all = 1.3101 } Zip/UnZip{ index = 0.1178 value = 0.7726 dict = 1.00 all = 0.7633 } ---------------------------- total value len = 62.427606 GB avg = 0.180 KB (by entry num) total key len = 6.793503 GB avg = 0.020 KB total ukey len = 3.192671 GB avg = 0.008 KB total ukey num = 0.389531300 Billion total entry num = 0.346409308 Billion write speed all = 1.841388754 MB/sec (with seq num) write speed all = 1.767668560 MB/sec (without seq num) 2024/08/20-04:00:33.175584 140500246459968 [compaction_job.cc:1944] [default] [JOB 4908] Generated table #14634746: 197739 keys, 102445969 bytes, temperature: kWarm 2024/08/20-04:00:33.175756 140500246459968 EVENT_LOG_v1 {"time_micros": 1724097633175626, "cf_name": "default", "job": 4908, "event": "table_file_creation", "file_number": 14634746, "file_size": 102445969, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189647000998, "largest_seqno": 189908757107, "table_properties": {"data_size": 100027264, "index_size": 372608, "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": 4745736, "raw_average_key_size": 24, "raw_value_size": 129472423, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 197739, "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": 1724097627, "oldest_key_time": 0, "file_creation_time": 1724097627, "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": 14634746, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-04:00:33.238717 140500246459968 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634747.sst) /dev/shm/ToplingTemp/Topling-155782-9N1rUG 2024/08/20-04:00:33.538861 140500246459968 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634747.sst): first pass time = 0.30's, 112.010'MB/sec 2024/08/20-04:00:34.430697 140500246459968 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634747.sst): old prealloc_size = 147639500, real_size = 25400784 2024/08/20-04:00:34.430797 140500246459968 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634747.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 49515 prefix = 4 raw-key = 0.0006 GB zip-key = 0.0001 GB avg-key = 12.00 avg-zkey = 2.04 raw-val = 0.0324 GB zip-val = 0.0253 GB avg-val = 654.86 avg-zval = 510.70 2024/08/20-04:00:34.430873 140500246459968 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634747.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0001 GB, waited 0.000 sec, Key+Value = 0.034 GB 2024/08/20-04:00:34.521724 140500246459968 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00/14634747.sst): second pass time = 0.89's, 36.390'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.09's, 284.447'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1343.211'MB/sec (index lex order gen) rebuild zvType time = 0.07's, 0.184'MB/sec write SST data time = 0.02's, 1094.683'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.326'MB, throughput = 8888.850'MB/sec zip my value time = 0.89's, unzip length = 0.032'GB zip my value throughput = 36.390'MB/sec zip pipeline throughput = 72.618'MB/sec entries = 49515 avg-key = 24.00 avg-zkey = 2.04 avg-val = 654.86 avg-zval = 510.70 usrkeys = 49515 avg-key = 16.00 avg-zkey = 2.04 avg-val = 661.86 avg-zval = 510.70 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 49515 bytes = 167136 } seq expand size = 346605 multi value expand size = 0 cnt WriteAppend = 156 UnZipSize{ index = 0.0008 GB value = 0.0324 GB dict = 0.33 MB all = 0.0336 GB } __ZipSize{ index = 0.0001 GB value = 0.0253 GB dict = 0.33 MB all = 0.0259 GB } UnZip/Zip{ index = 7.8446 value = 1.2823 dict = 1.00 all = 1.2986 } Zip/UnZip{ index = 0.1275 value = 0.7799 dict = 1.00 all = 0.7700 } ---------------------------- total value len = 62.460378 GB avg = 0.180 KB (by entry num) total key len = 6.794692 GB avg = 0.020 KB total ukey len = 3.193464 GB avg = 0.008 KB total ukey num = 0.389580815 Billion total entry num = 0.346458823 Billion write speed all = 1.842217482 MB/sec (with seq num) write speed all = 1.768489739 MB/sec (without seq num) 2024/08/20-04:00:34.556766 140500246459968 [compaction_job.cc:1944] [default] [JOB 4908] Generated table #14634747: 49515 keys, 25883474 bytes, temperature: kWarm 2024/08/20-04:00:34.556859 140500246459968 EVENT_LOG_v1 {"time_micros": 1724097634556812, "cf_name": "default", "job": 4908, "event": "table_file_creation", "file_number": 14634747, "file_size": 25883474, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189813291699, "largest_seqno": 189908757059, "table_properties": {"data_size": 25287232, "index_size": 100992, "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": 1188360, "raw_average_key_size": 24, "raw_value_size": 32425177, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 49515, "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": 1724097633, "oldest_key_time": 0, "file_creation_time": 1724097633, "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": 14634747, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-04:00:34.576270 140500246459968 [compaction_job.cc:699] job-04908: subcompact[0], size: 0.128329 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-04908/att-00 [14634746,14634747] 2024/08/20-04:00:34.634953 140500246459968 (Original Log Time 2024/08/20-04:00:25.381854) EVENT_LOG_v1 {"time_micros": 1724097625381785, "job": 4908, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [14634725], "files_L3": [14634679, 14634680], "score": 0.996906, "input_data_size": 146293040, "oldest_snapshot_seqno": 189908774122} 2024/08/20-04:00:34.634958 140500246459968 (Original Log Time 2024/08/20-04:00:34.634484) [compaction_job.cc:2018] [default] [JOB 4908] Compacted 1@2 + 2@3 files to L3 => 128329443 bytes 2024/08/20-04:00:34.634961 140500246459968 (Original Log Time 2024/08/20-04:00:34.634860) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 15.9 rd, 14.0 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(21.7, 117.8 +0.0 blob) out(122.4 +0.0 blob), read-write-amplify(12.1) write-amplify(5.6) OK, records in: 271194, records dropped: 23940 output_compression: Snappy 2024/08/20-04:00:34.634973 140500246459968 (Original Log Time 2024/08/20-04:00:34.634918) EVENT_LOG_v1 {"time_micros": 1724097634634892, "cf": "default", "job": 4908, "event": "compaction_finished", "compaction_time_micros": 9194426, "compaction_time_cpu_micros": 1110512, "output_level": 3, "num_output_files": 2, "total_output_size": 128329443, "num_input_records": 271194, "num_output_records": 247254, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 97924244, "file_range_sync_nanos": 0, "file_fsync_nanos": 1745, "file_prepare_write_nanos": 11454, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-04:00:34.800358 140500246459968 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":1724097625,"executesMs":9363,"compactionJobId":4908,"attempt":0,"compactionInputRawBytes":184084864,"compactionInputZipBytes":146293040,"compactionOutputRawBytes":0,"compactionOutputZipBytes":128329443,"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":"00-690725a18c4a4296768b236ffcd3c362-87c1e6a641bfbde3-00"}}, response = 2024/08/20-04:00:34.800448 140500246459968 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-04908/att-00: olev 3, work 9.364 s, result 4.805 ms, install 0.516 ms, input{raw 175.557 MiB zip 139.516 MiB}