IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Cache stats API
editCache stats API
editRetrieves statistics about the shared cache for partially mounted indices.
Prerequisites
editIf the Elasticsearch security features are enabled, you must have the
manage cluster privilege to use this API.
For more information, see Security privileges.
Path parameters
edit-
<node_id> -
(Optional, string) The names of particular nodes in the cluster to target.
For example,
nodeId1,nodeId2. For node selection options, see Node specification.
Query parameters
edit-
master_timeout -
(Optional, time units)
Period to wait for the master node. If the master node is not available before
the timeout expires, the request fails and returns an error. Defaults to
30s. Can also be set to-1to indicate that the request should never timeout.
Response body
edit-
nodes -
(object) Contains statistics for the nodes selected by the request.
Properties of
nodes-
<node_id> -
(object) Contains statistics for the node with the given identifier.
Properties of
<node_id>-
shared_cache -
(object) Contains statistics about the shared cache file.
Properties of
shared_cache-
reads - (long) Number of times the shared cache is used to read data from.
-
bytes_read_in_bytes - (long) The total of bytes read from the shared cache.
-
writes - (long) Number of times data from the blob store repository is written in the shared cache.
-
bytes_written_in_bytes - (long) The total of bytes written in the shared cache.
-
evictions - (long) Number of regions evicted from the shared cache file.
-
num_regions - (integer) Number of regions in the shared cache file.
-
size_in_bytes - (long) The total size in bytes of the shared cache file.
-
region_size_in_bytes - (long) The size in bytes of a region in the shared cache file.
-
-
-
Examples
editGets the statistics about the shared cache for partially mounted indices from all data nodes:
response = client.searchable_snapshots.cache_stats puts response
GET /_searchable_snapshots/cache/stats
The API returns the following response:
{
"nodes" : {
"eerrtBMtQEisohZzxBLUSw" : {
"shared_cache" : {
"reads" : 6051,
"bytes_read_in_bytes" : 5448829,
"writes" : 37,
"bytes_written_in_bytes" : 1208320,
"evictions" : 5,
"num_regions" : 65536,
"size_in_bytes" : 1099511627776,
"region_size_in_bytes" : 16777216
}
}
}
}