How to clear or disable eximstats on cPanel

What is eximstats

Eximstats, on WHM/cPanel servers, is used to maintain statistics and information about email messages processed by Exim mail service.

If the data in it is not cleared often enough it can grow, and cause issues with disk space, or MySQL resource usage, as the size of the database can cause higher memory and disk consumption.

Disabling eximstats

If you do not have any need for Exim statistics, which are used for Mail Delivery Reports on  Home »Email »Mail Delivery Reports, gathering exim statistics can be disabled from WHM or command line.

In WHM it can be disabled by going to Home »Service Configuration »Service Manager, and unchecking the service, and then clicking on the Save button on the bottom.

This will stop the database from being populated with new data.

Eximstats in Service Manager
Service Manager

From command line, you can disable the database from being populated by running a following command:
/usr/local/cpanel/bin/tailwatchd --disable=Cpanel::TailWatch::Eximstats

Lowering Eximstats retention time

Database is periodically cleaned, and by default Exim stats are retained in database for 10 days, which can be changed in WHM by going to Home »Server Configuration »Tweak Settings and changing the “The interval, in days, to retain Exim stats in the database” setting on the “Stats and Logs” tab.

Setting can also be changed by altering the “exim_retention_days” value in “/var/cpanel/cpanel.config” file.

Empty eximstats database

Database can be cleared either by deleting from its four tables, defers, failures, sends and smtp, or by dropping the database completely, and creating a fresh one with empty tables from “/usr/local/cpanel/etc/eximstats_db.sql” file.

To delete all of the data from the tables following command can be used:

mysql -e "use eximstats;delete from defers;delete from failures;delete from sends;delete from smtp;delete from smtp;"

To drop the database and recreate it again, following commands can be used:

mysqladmin drop eximstats
mysqladmin create eximstats
mysql eximstats < /usr/local/cpanel/etc/eximstats_db.sql
References:

https://forums.cpanel.net/threads/problem-in-eximstats.363382/

https://confluence2.cpanel.net/display/ALD/Service+Manager#ServiceManager-tailwatchd(TailWatchDrivers)

https://documentation.cpanel.net/display/ALD/Tweak+Settings+-+Stats+and+Logs#TweakSettings-StatsandLogs-Theinterval,indays,toretainEximstatsinthedatabase

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