+----------+--------------+------------+
| Database | Table        | Size in MB |
+----------+--------------+------------+
| zabbix   | history_uint | 85274.13   |
| zabbix   | history      | 81378.13   |
| zabbix   | history_text | 8190.34    |
| zabbix   | trends_uint  | 3663.63    |
| zabbix   | trends       | 2517.75    |
+----------+--------------+------------+

mysql> SELECT FROM_UNIXTIME(MIN(clock)) FROM `history_uint`;

+---------------------------+
| FROM_UNIXTIME(MIN(clock)) |
+---------------------------+
| 2018-04-18 12:42:23       |
+---------------------------+
 1 row in set (3 hours 2 min 34.39 sec)

80010:20191211:154527.042 forced execution of the housekeeper
 80010:20191211:154527.042 executing housekeeper
 80010:20191211:154527.170 housekeeper [deleted 0 hist/trends, 0 items/triggers, 2 events, 49 problems, 0 sessions, 0 alarms, 0 audit items in 0.075627 sec, idle for 1 hour(s)]

80010:20191211:160117.952 executing housekeeper
 80010:20191211:160117.952 __zbx_zbx_setproctitle() title:'housekeeper [connecting to the database]'
 80010:20191211:160117.952 In DBconnect() flag:0
 80010:20191211:160117.953 End of DBconnect():0
 80010:20191211:160117.954 __zbx_zbx_setproctitle() title:'housekeeper [removing old history and trends]'
 80010:20191211:160117.954 In housekeeping_history_and_trends() now:1576076477
 80010:20191211:160117.954 In hk_history_delete_queue_prepare_all()
 80010:20191211:160117.954 query [txnlev:0] [select i.itemid,i.value_type,i.history,i.trends,h.hostid from items i,hosts h where i.hostid=h.hostid and h.status in (0,1)]
 80010:20191211:160117.999 End of hk_history_delete_queue_prepare_all()
 *80010:20191211:160117.999 End of housekeeping_history_and_trends():0*
 80010:20191211:160117.999 __zbx_zbx_setproctitle() title:'housekeeper [removing old problems]'
 80010:20191211:160117.999 In housekeeping_problems() now:1576076477
 80010:20191211:160118.000 query without transaction detected
 80010:20191211:160118.000 query [txnlev:0] [delete from problem where r_clock<>0 and r_clock<1575990077]
 80010:20191211:160118.023 End of housekeeping_problems():130
 80010:20191211:160118.023 __zbx_zbx_setproctitle() title:'housekeeper [removing old events]'
 80010:20191211:160118.023 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=0 and events.object=0 and not exists (select null from problem where events.eventid=problem.eventid) and not exists (select null from problem where events.eventid=problem.r_eventid)' min_clock:1544539527 now:1576076477
 80010:20191211:160118.023 query [txnlev:0] [select eventid from events where clock<1544540477 and events.source=0 and events.object=0 and not exists (select null from problem where events.eventid=problem.eventid) and not exists (select null from problem where events.eventid=problem.r_eventid) order by eventid limit 5000]
 80010:20191211:160118.024 query without transaction detected
 80010:20191211:160118.025 query [txnlev:0] [delete from events where eventid in (862928,862929)]
 80010:20191211:160118.033 query [txnlev:0] [select eventid from events where clock<1544540477 and events.source=0 and events.object=0 and not exists (select null from problem where events.eventid=problem.eventid) and not exists (select null from problem where events.eventid=problem.r_eventid) order by eventid limit 5000]
 80010:20191211:160118.034 End of housekeeping_process_rule():2
 80010:20191211:160118.034 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=3 and events.object=0 and not exists (select null from problem where events.eventid=problem.eventid) and not exists (select null from problem where events.eventid=problem.r_eventid)' min_clock:1546259955 now:1576076477
 80010:20191211:160118.034 End of housekeeping_process_rule():0
 80010:20191211:160118.034 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=3 and events.object=4 and not exists (select null from problem where events.eventid=problem.eventid) and not exists (select null from problem where events.eventid=problem.r_eventid)' min_clock:1546453867 now:1576076477
 80010:20191211:160118.034 End of housekeeping_process_rule():0
 80010:20191211:160118.034 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=3 and events.object=5 and not exists (select null from problem where events.eventid=problem.eventid) and not exists (select null from problem where events.eventid=problem.r_eventid)' min_clock:1552392386 now:1576076477
 80010:20191211:160118.034 End of housekeeping_process_rule():0
 80010:20191211:160118.034 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=1 and events.object=1' min_clock:1576075114 now:1576076477
 80010:20191211:160118.034 End of housekeeping_process_rule():0
 80010:20191211:160118.034 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=1 and events.object=2' min_clock:1576075114 now:1576076477
 80010:20191211:160118.034 End of housekeeping_process_rule():0
 80010:20191211:160118.034 In housekeeping_process_rule() table:'events' field_name:'eventid' filter:'events.source=2 and events.object=3' min_clock:1576075114 now:1576076477
 80010:20191211:160118.034 End of housekeeping_process_rule():0
 80010:20191211:160118.034 __zbx_zbx_setproctitle() title:'housekeeper [removing old sessions]'
 80010:20191211:160118.034 In housekeeping_sessions() now:1576076477
 80010:20191211:160118.034 query without transaction detected
 80010:20191211:160118.035 query [txnlev:0] [delete from sessions where lastaccess<1544540477 limit 5000]
 80010:20191211:160118.035 End of housekeeping_sessions():0
 80010:20191211:160118.035 __zbx_zbx_setproctitle() title:'housekeeper [removing old service alarms]'
 80010:20191211:160118.035 In housekeeping_process_rule() table:'service_alarms' field_name:'servicealarmid' filter:'' min_clock:1576075114 now:1576076477
 80010:20191211:160118.035 End of housekeeping_process_rule():0
 80010:20191211:160118.035 __zbx_zbx_setproctitle() title:'housekeeper [removing old audit log items]'
 80010:20191211:160118.035 In housekeeping_process_rule() table:'auditlog' field_name:'auditid' filter:'' min_clock:1551118390 now:1576076477
 80010:20191211:160118.035 End of housekeeping_process_rule():0
 80010:20191211:160118.035 __zbx_zbx_setproctitle() title:'housekeeper [removing deleted items data]'
 80010:20191211:160118.035 In housekeeping_cleanup()
 80010:20191211:160118.035 query [txnlev:0] [select housekeeperid,tablename,field,value from housekeeper where tablename in ('history','history_log','history_str','history_text','history_uint','trends','trends_uint','events') order by tablename]
 80010:20191211:160118.036 query without transaction detected
 80010:20191211:160118.036 query [txnlev:0] [delete from problem where source=3 and object=5 and objectid=218744 limit 5000]
 80010:20191211:160118.037 query without transaction detected
 80010:20191211:160118.037 query [txnlev:0] [delete from problem where source=3 and object=4 and objectid=218744 limit 5000]
 80010:20191211:160118.037 query without transaction detected
 80010:20191211:160118.037 query [txnlev:0] [delete from problem where source=3 and object=5 and objectid=218743 limit 5000]
 80010:20191211:160118.038 query without transaction detected

80010:20191211:160119.398 End of housekeeping_cleanup():5912
 80010:20191211:160119.398 housekeeper [deleted 0 hist/trends, 5912 items/triggers, 2 events, 130 problems, 0 sessions, 0 alarms, 0 audit items in 1.444192 sec, idle for 1 hour(s)]
 80010:20191211:160119.398 __zbx_zbx_setproctitle() title:'housekeeper [*deleted 0 hist/trends,* 5912 items/triggers, 2 events, 0 sessions, 0 alarms, 0 audit items in 1.444192 sec, idle for 1 hour(s)]'

*80017:20191211:160146.640 slow query: 3.333721 sec, "select distinct itemid from trends where clock>=1576072800 and (itemid between 30699 and 30703 or itemid in (28900,28901,28902,33400,33401,33402,33403,37600,37601,37602,37603,37900,37901,37902,38199,38499,38500,38501,38502,42699,42700,43299,43300,43301,43302,107200,107201,107202,215502,217003))"*

*80015:20191211:160204.509 slow query: 23.082986 sec, "select distinct itemid from trends_uint where clock>=1576072800 and (itemid between 42981 and 42990 or itemid between 43280 and 43290 or itemid between 87681 and 87690 or itemid between 93979 and 93990 or itemid in (28582,29180,29181,29183,29184,29185,29188,29480,29481,29484,29488,29490,29491,30981,31280,31281,31282,31286,33050,33984,33985,33989,35483,35484,36080,36084,36085,37580,42080,54683,209180,209182,209183,214022,214023,214028,214085))"*
 *80014:20191211:160211.910 slow query: 32.203702 sec, "select distinct itemid from trends where clock>=1576072800 and (itemid between 28564 and 28568 or itemid between 29464 and 29469 or itemid between 30365 and 30371 or itemid between 37864 and 37870 or itemid between 38164 and 38171 or itemid between 38465 and 38470 or itemid between 42064 and 42069 or itemid in (30965,30966,30967,30968,31269,33367,42964,42965,43264,43265,43266,43268,43269,60362,60363,60370,188465,188466,188467))"*