env: v4.0.0-beta.1
当前没有client连接, tidb疯狂写log导致, server响应变慢, 且磁盘耗光:
$ ./tidb-server -V
Release Version: v4.0.0-beta.1
Git Commit Hash: 700d9def026185fe836dd56b0c39e0b4df3c320b
Git Branch: heads/refs/tags/v4.0.0-beta.1
UTC Build Time: 2020-02-28 12:11:30
GoVersion: go1.13
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false
$ ls -alh log/
total 17G
drwxr-xr-x 2 tidb tidb 4.0K Mar 18 09:45 .
drwxr-xr-x 15 tidb tidb 4.0K Mar 3 17:05 ..
-rw-r--r-- 1 tidb tidb 191K Mar 18 11:02 pd.log
-rw-r--r-- 1 tidb tidb 0 Mar 14 15:18 pd_stderr.log
-rw-r--r-- 1 tidb tidb 51K Mar 18 11:00 prometheus.log
-rw-r--r-- 1 tidb tidb 298M Mar 14 17:29 tidb-2020-03-14T17-29-10.704.log
-rw-r--r-- 1 tidb tidb 300M Mar 14 19:05 tidb-2020-03-14T19-05-10.730.log
-rw-r--r-- 1 tidb tidb 298M Mar 14 20:42 tidb-2020-03-14T20-42-10.682.log
-rw-r--r-- 1 tidb tidb 300M Mar 14 22:18 tidb-2020-03-14T22-18-10.727.log
-rw-r--r-- 1 tidb tidb 298M Mar 14 23:55 tidb-2020-03-14T23-55-10.690.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 01:31 tidb-2020-03-15T01-31-10.690.log
-rw-r--r-- 1 tidb tidb 300M Mar 15 03:07 tidb-2020-03-15T03-07-10.741.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 04:44 tidb-2020-03-15T04-44-10.705.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 06:20 tidb-2020-03-15T06-20-10.706.log
-rw-r--r-- 1 tidb tidb 300M Mar 15 07:56 tidb-2020-03-15T07-56-10.746.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 09:33 tidb-2020-03-15T09-33-10.686.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 11:09 tidb-2020-03-15T11-09-10.722.log
-rw-r--r-- 1 tidb tidb 300M Mar 15 12:45 tidb-2020-03-15T12-45-10.733.log
-rw-r--r-- 1 tidb tidb 299M Mar 15 14:22 tidb-2020-03-15T14-22-10.685.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 15:58 tidb-2020-03-15T15-58-10.689.log
-rw-r--r-- 1 tidb tidb 300M Mar 15 17:34 tidb-2020-03-15T17-34-10.729.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 19:11 tidb-2020-03-15T19-11-10.703.log
-rw-r--r-- 1 tidb tidb 298M Mar 15 20:47 tidb-2020-03-15T20-47-10.693.log
-rw-r--r-- 1 tidb tidb 300M Mar 15 22:23 tidb-2020-03-15T22-23-10.755.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 00:00 tidb-2020-03-16T00-00-10.715.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 01:36 tidb-2020-03-16T01-36-10.694.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 03:12 tidb-2020-03-16T03-12-10.678.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 04:48 tidb-2020-03-16T04-48-10.685.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 06:24 tidb-2020-03-16T06-24-10.711.log
-rw-r--r-- 1 tidb tidb 300M Mar 16 08:00 tidb-2020-03-16T08-00-10.749.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 09:37 tidb-2020-03-16T09-37-10.785.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 11:13 tidb-2020-03-16T11-13-10.701.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 12:49 tidb-2020-03-16T12-49-10.707.log
-rw-r--r-- 1 tidb tidb 300M Mar 16 14:25 tidb-2020-03-16T14-25-10.820.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 16:02 tidb-2020-03-16T16-02-10.764.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 17:38 tidb-2020-03-16T17-38-10.715.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 19:14 tidb-2020-03-16T19-14-10.727.log
-rw-r--r-- 1 tidb tidb 300M Mar 16 20:50 tidb-2020-03-16T20-50-10.920.log
-rw-r--r-- 1 tidb tidb 298M Mar 16 22:27 tidb-2020-03-16T22-27-10.685.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 00:03 tidb-2020-03-17T00-03-10.704.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 01:39 tidb-2020-03-17T01-39-10.704.log
-rw-r--r-- 1 tidb tidb 300M Mar 17 03:15 tidb-2020-03-17T03-15-10.921.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 04:52 tidb-2020-03-17T04-52-10.704.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 06:28 tidb-2020-03-17T06-28-10.851.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 08:04 tidb-2020-03-17T08-04-10.960.log
-rw-r--r-- 1 tidb tidb 300M Mar 17 09:40 tidb-2020-03-17T09-40-10.705.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 11:17 tidb-2020-03-17T11-17-10.680.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 12:53 tidb-2020-03-17T12-53-10.884.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 14:29 tidb-2020-03-17T14-29-10.772.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 16:05 tidb-2020-03-17T16-05-10.866.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 17:41 tidb-2020-03-17T17-41-10.703.log
-rw-r--r-- 1 tidb tidb 300M Mar 17 19:17 tidb-2020-03-17T19-17-10.725.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 20:54 tidb-2020-03-17T20-54-10.688.log
-rw-r--r-- 1 tidb tidb 298M Mar 17 22:30 tidb-2020-03-17T22-30-10.700.log
-rw-r--r-- 1 tidb tidb 298M Mar 18 00:06 tidb-2020-03-18T00-06-10.702.log
-rw-r--r-- 1 tidb tidb 300M Mar 18 01:42 tidb-2020-03-18T01-42-10.733.log
-rw-r--r-- 1 tidb tidb 299M Mar 18 03:19 tidb-2020-03-18T03-19-10.712.log
-rw-r--r-- 1 tidb tidb 300M Mar 18 04:55 tidb-2020-03-18T04-55-10.738.log
-rw-r--r-- 1 tidb tidb 299M Mar 18 06:32 tidb-2020-03-18T06-32-10.696.log
-rw-r--r-- 1 tidb tidb 300M Mar 18 08:08 tidb-2020-03-18T08-08-10.748.log
-rw-r--r-- 1 tidb tidb 298M Mar 18 09:45 tidb-2020-03-18T09-45-10.700.log
-rw-r--r-- 1 tidb tidb 267M Mar 18 11:10 tidb.log
-rw-r--r-- 1 tidb tidb 229K Mar 18 03:05 tidb_slow_query.log
-rw-r--r-- 1 tidb tidb 942 Mar 17 15:40 tidb_stderr.log
-rw-r--r-- 1 tidb tidb 28K Mar 18 11:02 tikv.log
-rw-r--r-- 1 tidb tidb 1.4M Mar 15 15:22 tikv.log2020-03-15-15:22:21.316634946
-rw-r--r-- 1 tidb tidb 34K Mar 16 15:22 tikv.log2020-03-16-15:22:30.948922136
-rw-r--r-- 1 tidb tidb 34K Mar 17 15:22 tikv.log2020-03-17-15:22:45.963428443
-rw-r--r-- 1 tidb tidb 0 Mar 14 15:18 tikv_stderr.log
$ head -1 log/tidb.log //head不会退出
...
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 24,\
\"name\": {\
\"O\": \"user_hidden\",\
\"L\": \"user_hidden\"\
},\
\"offset\": 23,\
\"origin_default\": null,\
\"default\": \"0\",\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
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\"Flen\": 4,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 25,\
\"name\": {\
\"O\": \"base_sha_on_merge\",\
\"L\": \"base_sha_on_merge\"\
},\
\"offset\": 24,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 254,\
\"Flag\": 0,\
\"Flen\": 40,\
\"Decimal\": 0,\
\"Charset\": \"utf8\",\
\"Collate\": \"utf8_bin\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
}\
],\
\"index_info\": [\
{\
\"id\": 1,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_user_id\",\
\"L\": \"index_pull_requests_on_user_id\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"user_id\",\
\"L\": \"user_id\"\
},\
\"offset\": 4,\
\"length\": -1\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 2,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_base_repository_id_and_base_ref\",\
\"L\": \"index_pull_requests_on_base_repository_id_and_base_ref\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"base_repository_id\",\
\"L\": \"base_repository_id\"\
},\
\"offset\": 7,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"base_ref\",\
\"L\": \"base_ref\"\
},\
\"offset\": 9,\
\"length\": 767\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 3,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_base_repository_id_and_head_ref\",\
\"L\": \"index_pull_requests_on_base_repository_id_and_head_ref\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"base_repository_id\",\
\"L\": \"base_repository_id\"\
},\
\"offset\": 7,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"head_ref\",\
\"L\": \"head_ref\"\
},\
\"offset\": 10,\
\"length\": 767\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 4,\
\"idx_name\": {\
\"O\": \"head_repository_id_and_head_ref_and_head_sha\",\
\"L\": \"head_repository_id_and_head_ref_and_head_sha\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"head_repository_id\",\
\"L\": \"head_repository_id\"\
},\
\"offset\": 8,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"head_ref\",\
\"L\": \"head_ref\"\
},\
\"offset\": 10,\
\"length\": 767\
},\
{\
\"name\": {\
\"O\": \"head_sha\",\
\"L\": \"head_sha\"\
},\
\"offset\": 2,\
\"length\": -1\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 5,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_repository_id_and_head_ref\",\
\"L\": \"index_pull_requests_on_repository_id_and_head_ref\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"repository_id\",\
\"L\": \"repository_id\"\
},\
\"offset\": 3,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"head_ref\",\
\"L\": \"head_ref\"\
},\
\"offset\": 10,\
\"length\": 767\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 6,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_repository_id_and_user_id_and_user_hidden\",\
\"L\": \"index_pull_requests_on_repository_id_and_user_id_and_user_hidden\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"repository_id\",\
\"L\": \"repository_id\"\
},\
\"offset\": 3,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"user_id\",\
\"L\": \"user_id\"\
},\
\"offset\": 4,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"user_hidden\",\
\"L\": \"user_hidden\"\
},\
\"offset\": 23,\
\"length\": -1\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 7,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_user_hidden_and_user_id\",\
\"L\": \"index_pull_requests_on_user_hidden_and_user_id\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"user_hidden\",\
\"L\": \"user_hidden\"\
},\
\"offset\": 23,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"user_id\",\
\"L\": \"user_id\"\
},\
\"offset\": 4,\
\"length\": -1\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
},\
{\
\"id\": 8,\
\"idx_name\": {\
\"O\": \"index_pull_requests_on_repository_id_and_head_sha\",\
\"L\": \"index_pull_requests_on_repository_id_and_head_sha\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"repository_id\",\
\"L\": \"repository_id\"\
},\
\"offset\": 3,\
\"length\": -1\
},\
{\
\"name\": {\
\"O\": \"head_sha\",\
\"L\": \"head_sha\"\
},\
\"offset\": 2,\
\"length\": -1\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
}\
],\
\"fk_info\": null,\
\"state\": 5,\
\"pk_is_handle\": true,\
\"comment\": \"\",\
\"auto_inc_id\": 0,\
\"max_col_id\": 25,\
\"max_idx_id\": 8,\
\"update_timestamp\": 415033563129839619,\
\"ShardRowIDBits\": 0,\
\"max_shard_row_id_bits\": 0,\
\"auto_random_bits\": 0,\
\"pre_split_regions\": 0,\
\"partition\": null,\
\"compression\": \"\",\
\"view\": null,\
\"sequence\": null,\
\"Lock\": null,\
\"version\": 3,\
\"tiflash_replica\": null\
},\
{\
\"id\": 643,\
\"name\": {\
\"O\": \"newsletter_preferences\",\
\"L\": \"newsletter_preferences\"\
},\
\"charset\": \"utf8\",\
\"collate\": \"utf8_bin\",\
\"cols\": [\
{\
\"id\": 1,\
\"name\": {\
\"O\": \"id\",\
\"L\": \"id\"\
},\
\"offset\": 0,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 3,\
\"Flag\": 515,\
\"Flen\": 11,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 2,\
\"name\": {\
\"O\": \"user_id\",\
\"L\": \"user_id\"\
},\
\"offset\": 1,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 3,\
\"Flag\": 4105,\
\"Flen\": 11,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 3,\
\"name\": {\
\"O\": \"elected_marketing_at\",\
\"L\": \"elected_marketing_at\"\
},\
\"offset\": 2,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 12,\
\"Flag\": 128,\
\"Flen\": 19,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 4,\
\"name\": {\
\"O\": \"elected_transactional_at\",\
\"L\": \"elected_transactional_at\"\
},\
\"offset\": 3,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 12,\
\"Flag\": 128,\
\"Flen\": 19,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 5,\
\"name\": {\
\"O\": \"created_at\",\
\"L\": \"created_at\"\
},\
\"offset\": 4,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 12,\
\"Flag\": 4225,\
\"Flen\": 19,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 6,\
\"name\": {\
\"O\": \"updated_at\",\
\"L\": \"updated_at\"\
},\
\"offset\": 5,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 12,\
\"Flag\": 4225,\
\"Flen\": 19,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
}\
],\
\"index_info\": [\
{\
\"id\": 1,\
\"idx_name\": {\
\"O\": \"index_newsletter_preferences_on_user_id\",\
\"L\": \"index_newsletter_preferences_on_user_id\"\
},\
\"tbl_name\": {\
\"O\": \"\",\
\"L\": \"\"\
},\
\"idx_cols\": [\
{\
\"name\": {\
\"O\": \"user_id\",\
\"L\": \"user_id\"\
},\
\"offset\": 1,\
\"length\": -1\
}\
],\
\"is_unique\": false,\
\"is_primary\": false,\
\"state\": 5,\
\"comment\": \"\",\
\"index_type\": 1\
}\
],\
\"fk_info\": null,\
\"state\": 5,\
\"pk_is_handle\": true,\
\"comment\": \"\",\
\"auto_inc_id\": 0,\
\"max_col_id\": 6,\
\"max_idx_id\": 1,\
\"update_timestamp\": 415033566944034829,\
\"ShardRowIDBits\": 0,\
\"max_shard_row_id_bits\": 0,\
\"auto_random_bits\": 0,\
\"pre_split_regions\": 0,\
\"partition\": null,\
\"compression\": \"\",\
\"view\": null,\
\"sequence\": null,\
\"Lock\": null,\
\"version\": 3,\
\"tiflash_replica\": null\
},\
{\
\"id\": 705,\
\"name\": {\
\"O\": \"oauth_application_logos\",\
\"L\": \"oauth_application_logos\"\
},\
\"charset\": \"utf8\",\
\"collate\": \"utf8_bin\",\
\"cols\": [\
{\
\"id\": 1,\
\"name\": {\
\"O\": \"id\",\
\"L\": \"id\"\
},\
\"offset\": 0,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 3,\
\"Flag\": 515,\
\"Flen\": 11,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 2,\
\"name\": {\
\"O\": \"uploader_id\",\
\"L\": \"uploader_id\"\
},\
\"offset\": 1,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 3,\
\"Flag\": 4105,\
\"Flen\": 11,\
\"Decimal\": 0,\
\"Charset\": \"binary\",\
\"Collate\": \"binary\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 3,\
\"name\": {\
\"O\": \"name\",\
\"L\": \"name\"\
},\
\"offset\": 2,\
\"origin_default\": null,\
\"default\": null,\
\"default_bit\": null,\
\"default_is_expr\": false,\
\"generated_expr_string\": \"\",\
\"generated_stored\": false,\
\"dependences\": null,\
\"type\": {\
\"Tp\": 15,\
\"Flag\": 4097,\
\"Flen\": 255,\
\"Decimal\": 0,\
\"Charset\": \"utf8\",\
\"Collate\": \"utf8_bin\",\
\"Elems\": null\
},\
\"state\": 5,\
\"comment\": \"\",\
\"hidden\": false,\
\"version\": 2\
},\
{\
\"id\": 4,\
\"name\": {\
\"O\": \"content_type\",\
\"L\": \"content_type\"\
},\
\"offset\": 3,\
\"origin_default\": null,\
\"default\": null,\
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...