Plsql_ Previous normal program has a sudden performance problem (case) due to statistical information

Select Sid, Sql_id from v$session where sid = 1001

Select B.begin_interval_time, A.disk_reads_total, A.buffer_gets_total,a.buffer_gets_delta, A.rows_processed_total, A.plan_hash_value
From Dba_hist_sqlstat A, dba_hist_snapshot b
where a.snap_id = b.snap_id and sql_id = ' 466bpq7055f4c ' ORDER by 1 desc;

select* from V$sql_plan

Select Name, last_analized from Dba_tables

EXEC dbms_stats.gather_table_stats (ownname=> ' BOXV2 ',tabname=> ' Ft_t_posh ', estimate_percent=>3,degree= >32,granularity=> ' GLOBAL ', cascade=>false,no_invalidate=>false);

Plsql_ Previous normal program has a sudden performance problem (case) due to statistical information