CouchDB Shared Cache Test
Shared cache can be accessed by multiple cores. Since it is shared, each block in the cache is unique and therefore has a larger hit rate as there will be no duplicate blocks. However, data-access latency can increase as multiple cores try to access the same cache.
This test reports the rate of hits on the shared cache, the rate of shared cache that were missed and were totally evicted. By keeping an eye on these metrics over time, administrators can proactively detect a consistent drop in cache hits, investigate the reasons for the same, and promptly initiate measures to improve cache usage and safeguard the server performance.
Target of the test : Apache CouchDB Server
Agent deploying the test : An internal/remote agent
Outputs of the test : One set of results for the target Apache CouchDB Server.
| Parameter | Description |
|---|---|
|
Test period |
How often should the test be executed. |
|
Host |
The IP address of the target server that is being monitored. |
|
Port |
The port number through which the Couchdb server communicates. The default port is 5984. |
|
Username |
In order to monitor an Apache CouchDB server, a special database user account with Admin privilege has to be created in every Apache CouchDB server instance that requires monitoring. In the Username text box, specify the Username for monitoring the target Apache CouchDB server instance.To create a new user, refer Pre-requisites for Monitoring Apache CouchDB topic. |
|
Password |
Specify the password of the specified Username. |
|
Confirm Password |
Confirm the password by retyping it here. |
| Measurement | Description | Measurement Unit | Interpretation |
|---|---|---|---|
|
Shared cache hit rate |
Indicates the rate of cache hits occurred on shared cache. |
Hits/sec |
|
|
Shared cache miss rate |
Indicates the rate of miss hits occurred on shared cache. |
Misses/sec |
A high value for this measure indicates that shared cache needs to be allocated with additional resources. |
|
Shared cache eviction rate |
Indicates the rate of evictions occurred on shared cache. |
Events/sec |
|
