Oracle insert statement strange performance problems

Oracle insert statement strange performance problem exception statement: www.2cto.com insert into t_i18n values ('com. huawei. support. enterprise. web. page. mySpace. halp. trainingBackList ', 'zh', 'Return', sysdate, 'test1'); no response has been returned during insertion; changed to insert into t_i18n values ('com. huawei. support. enterprise. web. page. mySpace. halp. trainingBack ', 'zh', 'Return', sysdate, 'test1'); you can insert the table structure: -- Create table create table T_I18N (KEY VARCHAR2 (1000) not null, LANG VARCHAR2 (10) not null, CONTENT VARCHAR2 (4000) not null, LAST_UPDATE_TIME DATE not null, LAST_UPDATE_BY VARCHAR2 (100) not null) tablespace SUPPORTE pctfree 10 initrans 1 maxtrans 255 storage (initial 256 next 1 minextents 1 maxextents unlimited); -- Create/Recreate primary, unique and foreign key constraints alter table T_I18N add constraint UN_I18N unique (KEY, LANG) using index tablespace SUPPORTE pctfree 10 initrans 2 maxtrans 255 storage (initial 192 K next 1 M minextents 1 maxextents unlimited); -- Create/Recreate indexes create index IDX_T_I18N_KEY on T_I18N (KEY) tablespace SUPPORTE pctfree 10 initrans 2 maxtrans 255 storage (initial 192 K next 1 M minextents 1 maxextents unlimited); create index IDX_T_I18N_LANG on T_I18N (LANG) tablespace SUPPORTE pctfree 10 initrans 2 maxtrans 255 storage (initial 128 K next 1 M minextents 1 maxextents unlimited); create index IDX_T_LAST_UPDATE_TIME on T_I18N (LAST_UPDATE_TIME) tablespace SUPPORTE pctfree 10 initrans 2 maxtrans 255 storage (initial 128 K next 1 M minextents 1 maxextents unlimited );