Maria Queue Cache Test
This test monitors the health of the query cache in the Maria Database server.
Target of the test : A Maria Database server
Agent deploying the test : An internal/remote agent
Outputs of the test : One set of results for the database being monitored.
| Parameter | Description |
|---|---|
|
Test Period |
How often should the test be executed. |
|
Host |
The IP address of the Maria Database server. |
|
Port |
The port on which the server is listening. |
|
Database |
Specify the name of the database that is to be monitored on the target Maria Database server. |
|
User and Password |
The eG agent has to be configured with the credentials of a user who has server-wide PROCESS and SELECT privileges on the monitored Maria Database server. To know how to create such a user, refer to Configuring the eG Agent with Access Privileges |
|
Confirm Password |
Confirm the password by retyping it here. |
|
SSL |
This indicates that the eG agent will communicate with the Maria Database via HTTPS or not. By default, this flag is set to No, as the target Maria database is not SSL-enabled by default. If the target database is SSL-enabled, then set this flag to Yes. |
|
Verify CA |
If the eG agent is required to establish an encrypted connection with the target Maria Database server by authenticating the server's identity through verifying the server CA certificate, set Verify CA flag to Yes. By default, this flag is set to No. |
| Measurement | Description | Measurement Unit | Interpretation |
|---|---|---|---|
|
Queries registered |
Indicates the number of queries that are registered with the cache. |
Number |
|
|
Queries added |
Indicates the number of queries added to the cache during the last measurement period. |
Number |
|
|
Cache hits |
Indicates the number of times the cache was accessed during the last measurement period. |
Number |
|
|
Queries deleted |
Indicates the number of queries that were deleted from the cache during the last measurement period. |
Number |
A high value could indicate low memory allocation for the query cache. Since reading from the cache is less expensive than reading directly from the database, a higher memory allocation to the cache is advisable. |
|
Non cached queries |
Indicates the number of queries that were not cached (not cacheable due to their QUERY_CACHE_TYPE) during the last measurement period. |
Number |
|
|
Free memory |
Indicates the amount of free memory in the query cache. |
MB |
A low value of this measure could cause subsequent queries to be rejected by the cache, owing to low memory availability. It would be good practice to tune the cache memory to handle more load. |
|
Free blocks |
Indicates the number of free memory blocks in the query cache currently. |
Number |
|
|
Total blocks |
Indicates the total number of blocks in the query cache currently. |
Number |
|
|
Total queries |
This is the sum of cache inserts, cache hits, and non-cached queries during the last measurement period. |
Number |
|
