# ARRING
```json metadata
{
"title": "ARRING",
"description": "Inserts values into a ring buffer of specified size, wrapping and truncating as needed.",
"categories": ["docs","develop","stack","oss","rs","rc","oss","kubernetes","clients"],
"arguments": [{"key_spec_index":0,"name":"key","type":"key"},{"name":"size","type":"integer"},{"multiple":true,"name":"value","type":"string"}],
"syntax_fmt": "ARRING key size value [value ...]",
"complexity": "O(M) normally, O(N+M) on ring resize, where N is the maximum of the old and new ring size and M is the number of inserted values",
"group": "array",
"command_flags": ["WRITE","DENYOOM"],
"acl_categories": ["ARRAY"],
"since": "8.8.0",
"arity": -4,
"key_specs": [{"begin_search":{"index":{"pos":1}},"find_keys":{"range":{"lastkey":0,"limit":0,"step":1}},"flags":["RW","UPDATE"]}],
"tableOfContents": {"sections":[{"id":"required-arguments","title":"Required arguments"},{"id":"examples","title":"Examples"},{"id":"return-information","title":"Return information"}]}
,
"codeExamples": []
}
```Inserts values into a ring buffer of specified size, wrapping and truncating as needed.
## Required arguments
key
The name of the key that holds the array.
size
The size of the ring buffer window. Each value is inserted at `insert_idx % size`, wrapping back to index `0` when the end of the window is reached. When the buffer is full, newer values overwrite older ones. If `size` is smaller than the current window, the array is truncated to fit.
value
One or more string values to insert into the ring buffer. Each value is placed at the next position in the ring and the cursor advances accordingly.