|
From slow query log:
# Thread_id: 161 Schema: hotspot QC_hit: No
|
# Query_time: 17.934323 Lock_time: 0.000119 Rows_sent: 0 Rows_examined: 4
|
#
|
# explain: id select_type table type possible_keys key key_len ref rows Extra
|
# explain: 1 SIMPLE radacct range AcctSessionId,UserName_AcctSessionId,UserStop UserName_AcctSessionId 52 NULL 1 Using where; Using buffer
|
#
|
SET timestamp=1443470903;
|
UPDATE radacct ....
|
Got same query plan with explain:
Found in slow query log. Tried to look up what "Using buffer" on https://mariadb.com/kb/en/mariadb/explain/ actually mean and couldn't see an explanation.
|