1GET /v{version}/ddc/ob/instance/{instanceId}/parameters HTTP/1.1
2Host: ddc.bj.baidubce.com
3Authorization: authorization string

1GET http://ddc.bj.baidubce.com/v1/ddc/ob/instance/ob7eyqcco3ya4g/parameters
2Host: ddc.bj.baidubce.com
3Authorization: bce-auth-v1/f81d3b34e48048fbb2634dc7882d7e21/2015-08-11T04:17:29Z/3600/host/74c506f68c65e26c633bfa104c863fffac5190fdec1ec24b7c03eb5d67d2e1de

1HTTP/1.1 200 OK
2Content-Type: application/json;charset=UTF-8
3Date: Wed, 08 Jul 2015 03:28:11 GMT
4x-bce-request-id: d8752367-38e8-45e4-b4c7-e53be3137ce5
5Server: BWS
6{
7    "result": [
8        {
9            "name": "location_refresh_thread_count",
10            "currentValue": "3",
11            "needReboot": false,
12            "defaultValue": "4",
13            "valueType": "RANGE",
14            "acceptableValue": [
15                "2",
16                "64"
17            ],
18            "rejectedValue": [],
19            "description": "The number of threads used for refreshing the location cache."
20        },
21        {
22            "name": "user_row_cache_priority",
23            "currentValue": "1",
24            "needReboot": false,
25            "defaultValue": "1",
26            "valueType": "RANGE",
27            "acceptableValue": [
28                "1",
29                "99"
30            ],
31            "rejectedValue": [],
32            "description": "The priority of baseline data row cache in the cache system."
33        },
34        {
35            "name": "schema_history_expire_time",
36            "currentValue": "7d",
37            "needReboot": false,
38            "defaultValue": "7d",
39            "valueType": "TIME",
40            "acceptableValue": [
41                "1h",
42                "30d"
43            ],
44            "rejectedValue": [],
45            "description": "The object retention time in the recycle bin."
46        },
47        {
48            "name": "fuse_row_cache_priority",
49            "currentValue": "1",
50            "needReboot": false,
51            "defaultValue": "1",
52            "valueType": "RANGE",
53            "acceptableValue": [
54                "1",
55                "99"
56            ],
57            "rejectedValue": [],
58            "description": "The priority for row cache fusion in the cache system."
59        },
60        {
61            "name": "sys_bkgd_net_percentage",
62            "currentValue": "60",
63            "needReboot": false,
64            "defaultValue": "60",
65            "valueType": "RANGE",
66            "acceptableValue": [
67                "0",
68                "100"
69            ],
70            "rejectedValue": [],
71            "description": "The percentage of network bandwidth that can be used by background system tasks."
72        },
73        {
74            "name": "large_query_threshold",
75            "currentValue": "5s",
76            "needReboot": false,
77            "defaultValue": "100ms",
78            "valueType": "TIME",
79            "acceptableValue": [
80                "1ms",
81                "10s"
82            ],
83            "rejectedValue": [],
84            "description": "Specifies the execution time threshold at which a query is classified as a large query. When this threshold is reached, large query scheduling strategies are implemented."
85        },
86        {
87            "name": "micro_block_merge_verify_level",
88            "currentValue": "2",
89            "needReboot": false,
90            "defaultValue": "2",
91            "valueType": "RANGE",
92            "acceptableValue": [
93                "0",
94                "3"
95            ],
96            "rejectedValue": [],
97            "description": "Specifies the verification level of macroblocks in a major compaction."
98        },
99        {
100            "name": "bf_cache_priority",
101            "currentValue": "1",
102            "needReboot": false,
103            "defaultValue": "1",
104            "valueType": "RANGE",
105            "acceptableValue": [
106                "1",
107                "99"
108            ],
109            "rejectedValue": [],
110            "description": "Specifies the priority of the Bloom filter cache."
111        },
112        {
113            "name": "bf_cache_miss_count_threshold",
114            "currentValue": "100",
115            "needReboot": false,
116            "defaultValue": "100",
117            "valueType": "RANGE",
118            "acceptableValue": [
119                "1",
120                "65535"
121            ],
122            "rejectedValue": [],
123            "description": "Used to control the trigger count for bloom filter cache. When the macro block miss count reaches this value, a bloom filter cache is created. 0 means disabled."
124        },
125        {
126            "name": "user_block_cache_priority",
127            "currentValue": "1",
128            "needReboot": false,
129            "defaultValue": "1",
130            "valueType": "RANGE",
131            "acceptableValue": [
132                "1",
133                "99"
134            ],
135            "rejectedValue": [],
136            "description": "The priority of block index in the cache system."
137        },
138        {
139            "name": "memory_reserved",
140            "currentValue": "500M",
141            "needReboot": false,
142            "defaultValue": "500M",
143            "valueType": "CAPACITY",
144            "acceptableValue": [
145                "10M",
146                "2G"
147            ],
148            "rejectedValue": [],
149            "description": "The size of memory reserved."
150        },
151        {
152            "name": "builtin_db_data_verify_cycle",
153            "currentValue": "20",
154            "needReboot": false,
155            "defaultValue": "20",
156            "valueType": "RANGE",
157            "acceptableValue": [
158                "0",
159                "360"
160            ],
161            "rejectedValue": [],
162            "description": "The self-check cycle for corrupted blocks, in days. The value 0 means no checking."
163        },
164        {
165            "name": "location_fetch_concurrency",
166            "currentValue": "20",
167            "needReboot": false,
168            "defaultValue": "20",
169            "valueType": "RANGE",
170            "acceptableValue": [
171                "1",
172                "1000"
173            ],
174            "rejectedValue": [],
175            "description": "The maximum level of concurrency for refreshing location cache information."
176        },
177        {
178            "name": "virtual_table_location_cache_expire_time",
179            "currentValue": "8s",
180            "needReboot": false,
181            "defaultValue": "8s",
182            "valueType": "TIME",
183            "acceptableValue": [
184                "1s",
185                "3600s"
186            ],
187            "rejectedValue": [],
188            "description": "The expiration time for cached location information of virtual tables."
189        },
190        {
191            "name": "location_cache_refresh_min_interval",
192            "currentValue": "100ms",
193            "needReboot": false,
194            "defaultValue": "100ms",
195            "valueType": "TIME",
196            "acceptableValue": [
197                "0ms",
198                "10s"
199            ],
200            "rejectedValue": [],
201            "description": "The minimum interval for sending location cache refresh requests, which prevents excessive refresh requests from overloading the system."
202        },
203        {
204            "name": "recyclebin_object_expire_time",
205            "currentValue": "1m",
206            "needReboot": false,
207            "defaultValue": "7d",
208            "valueType": "TIME",
209            "acceptableValue": [
210                "0s",
211                "1000d"
212            ],
213            "rejectedValue": [],
214            "description": "Expiration time for objects in the recycle bin. A value of 0s indicates that the automatic purge feature of the recycle bin is disabled. A non-zero value means that the schema objects that have remained in recycle bin for the specified time will be purged."
215        }
216    ]
217}