Perhaps you are often asked about the monthly data volume growth of a certain table in the library in the past year. Of course, if you have tables divided by month, it is easier to handle. show table status
one by one. If there is only one big table, then you probably have to run SQL statistics in the lonely night when everyone is resting, because you Only the current table information can be obtained, and historical information cannot be traced.
In addition, as a DBA, you must also estimate the growth of database space to plan capacity. The table information we are talking about mainly includes:
auto_increment, in addition to paying attention to where the current growth is, we also care about how much free space is compared to the maximum value of
int / bigint. So the
autoIncrUsage column was calculated to save the currently used ratio.
settings_dbs.py Configuration file
: List Store the MySQL instance table information that needs to be collected. The tuples are the connection address, port, user name, and password. Users need the permission to select the table, otherwise they cannot see the corresponding information.
: Influxdb connection information, please create the database name in advance mysql_info
is set to
None
The output result is json.
CREATE DATABASE "mysql_info" CREATE RETENTION POLICY "mysql_info_schema" ON "mysql_info" DURATION 730d REPLICATION 1 DEFAULTLook at the big information similar to:
before and after migration to collect it. Not recommended too often. <pre class="brush:sql;toolbar:false;">40 23,5,12,18 * * * /opt/DBschema_info/mysql_schema_info.py >> /tmp/collect_DBschema_info.log 2>&1</pre>
under the project into the Grafana panel. The effect is as follows:
Table data size and number of rows
##Increment in the number of rows per day, auto_increment usage
In the case of sub-database and table, the global unique ID cannot be calculated in the table autoIncrUsage
It is actually very difficult to implement Simple, the more important thing is to awaken the awareness of collecting this information
You can add Graphite output format
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