MySQL Resources Test

This test measures the effect of query execution on the disk and memory resources of the MySQL server in terms of files opened, temporary files created, delayed thread inserts, active threads etc.

Target of the test : A MySQL server

Agent deploying the test : An internal/remote agent

Outputs of the test : One set of results for the database being monitored

Configurable parameters for the test
Parameter	Description
Test Period	How often should the test be executed.
Host	The IP address of the MySQL server.
Port	The port at which the specified host listens.
Database	Specify the name of a database on the target MySQL database server being monitored
Username 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 MySQL server. To know how to create such a user, refer to Pre-requisites for Monitoring the MySQL Server topic. For the MySQL Bin Log test to run, the user should additionally possess the following privileges. To configure the above-mentioned user with the specific privileges, issue the commands given below: GRANT REPLICATION CLIENT on . to '<username>'@'<IP_address_of_eG_agent>'; GRANT REPLICATION SLAVE on . to '<username>'@'<IP_address_of_eG_agent>'; GRANT EXECUTE on . to '<username>'@'<IP_address_of_eG_agent>';
Confirm Password	Confirm the password by retyping it here.
Allow Public Key	By default, the Allow Public Key flag is set to No. But, if the specified USER is created with caching_sha2_password as the authentication plugin, then the eG agent can connect to the target database cluster using RSA public key. To this effect, you have to set Allow Public Key flag to Yes.
SSL	By default, the SSL flag is set to No, indicating that the target MySQL database server is not SSL-enabled by default. To enable the test to connect to an SSL-enabled MySQL database server , set the SSL flag to Yes.
Verify CA	If the eG agent is required to establish an encrypted connection with the target MySQL 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.
Truststore Password	This parameter is applicable only if the Verify CA parameter is set to Yes. To verify the target server certificate, provide the password of the truststore file which contains the server CA certificate in the Truststore Password text box. By default, this parameter is set to none.
Confirm Password	Confirm the Password by retyping it in the Confirm Password text box.
Keystore Password	This parameter is applicable only if the Verify CA parameter is set to Yes. To establish a connection with the target MySQL database server , the eG agent needs to have access to the client certificate. For this provide the password of the keystore file which contains the client certificate in the Keystore Password text box. By default, this parameter is set to none.
Confirm Password	Confirm the Password by retyping it in the Confirm Password text box.
Detailed Diagnosis	To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option. The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled: The eG manager license should allow the detailed diagnosis capability Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
Open files	Indicates the number of files that were opened during the last measurement period.	Number
Created temporary files	Indicates the number of implicit temporary files that were created on the tables of the disk, while executing statements during the last measurement period.	Number
Ratio of created temp tables on disk	Indicates the percentage of temporary tables that were created on the disk, while executing statements on this node.	Percent
Opened tables cache hits	Indicates the number of hits for open tables cache lookups.	Number
Opened tables cache misses	Indicates the number of misses for open tables cache lookups.	Number
Opened tables hit ratio	Indicates the percentage of hits for open tables cache lookups.	Percent	Compare the value of this measure across nodes to figure out the node on which maximum percentage of hits for open tables cache lookups were noticed.
Delayed insert threads	Indicates the number of delayed insert handler threads that are in use.	Number
Slow launch threads	Indicates the number of threads that have taken more than slow_launch_time for creation on the database, during the last measurement period.	Number	A high value for this measure could cause excessive delay in processing new connection requests to the database server.
Threads active	Indicates the number of threads that are currently active.	Number	A high value for this measure is indicative of a high load on each node of the target cluster database server.
Threads cached	Indicates the number of threads in the thread cache of the database currently.	Number
Threads spawned	Indicates the number of threads newly created to handle new connections on the database during the last measurement period.	Number	Where possible ensure that the number of total threads is not set to be much larger than the maximum number of simultaneous requests expected for the server.
Open threads	Indicates the number of threads that were opened on the database during the last measurement period.	Number
Thread usage	Indicates the percentage of threads that were in use during the last measurement period.	Percent