oracle dba 常用語句2____oracle

11。查看資料表的參數資訊SELECT   partition_name, high_value, high_value_length, tablespace_name,        pct_free, pct_used, ini_trans, max_trans, initial_extent,        next_extent, min_extent, max_extent, pct_increase, FREELISTS,        freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks,        empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size,        last_analyzed   FROM dba_tab_partitions  --WHERE table_name = :tname AND table_owner = :townerORDER BY partition_position 12.查看還沒提交的事務select * from v$locked_object;select * from v$transaction; 13。尋找object為哪些進程所用selectp.spid,s.sid,s.serial# serial_num,s.username user_name,a.type  object_type,s.osuser os_user_name,a.owner,a.object object_name,decode(sign(48 - command),1,to_char(command), 'Action Code #' || to_char(command) ) action,p.program oracle_process,s.terminal terminal,s.program program,s.status session_status  from v$session s, v$access a, v$process p  where s.paddr = p.addr and     s.type = 'USER' and        a.sid = s.sid   and  a.object='SUBSCRIBER_ATTR'order by s.username, s.osuser 14。復原段查看select rownum, sys.dba_rollback_segs.segment_name Name, v$rollstat.extentsExtents, v$rollstat.rssize Size_in_Bytes, v$rollstat.xacts XActs,v$rollstat.gets Gets, v$rollstat.waits Waits, v$rollstat.writes Writes,sys.dba_rollback_segs.status status from v$rollstat, sys.dba_rollback_segs,v$rollname where v$rollname.name(+) = sys.dba_rollback_segs.segment_name andv$rollstat.usn (+) = v$rollname.usn order by rownum 15。耗資源的進程（top session）select s.schemaname schema_name,    decode(sign(48 - command), 1,to_char(command), 'Action Code #' || to_char(command) ) action,    statussession_status,   s.osuser os_user_name,   s.sid,         p.spid ,         s.serial# serial_num,  nvl(s.username, '[Oracle process]') user_name,   s.terminal terminal,   s.program program,   st.value criteria_value  from v$sesstat st,   v$session s  , v$process p  where st.sid = s.sid and   st.statistic# = to_number('38') and   ('ALL' = 'ALL'or s.status = 'ALL') and p.addr = s.paddr order by st.value desc,  p.spid asc, s.username asc, s.osuser asc 16。查看鎖（lock）情況select /*+ RULE */ ls.osuser os_user_name,   ls.username user_name,  decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX','Transaction enqueue lock', 'UL', 'User supplied lock') lock_type,  o.object_name object,   decode(ls.lmode, 1, null, 2, 'Row Share', 3,'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)lock_mode,    o.owner,   ls.sid,   ls.serial# serial_num,   ls.id1,   ls.id2   from sys.dba_objects o, (   select s.osuser,    s.username,    l.type,    l.lmode,    s.sid,    s.serial#,    l.id1,    l.id2   from v$session s,    v$lock l   where s.sid = l.sid ) ls  where o.object_id = ls.id1 and    o.owner<> 'SYS'   order by o.owner, o.object_name 17。查看等待（wait）情況SELECT v$waitstat.class, v$waitstat.count count, SUM(v$sysstat.value) sum_valueFROM v$waitstat, v$sysstat WHERE v$sysstat.name IN ('db block gets','consistent gets') group by v$waitstat.class, v$waitstat.count 18。查看sga情況SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC 19。查看catched objectSELECT owner,              name,              db_link,              namespace,            type,              sharable_mem,              loads,              executions,            locks,              pins,              kept        FROM v$db_object_cache         20。查看V$SQLAREASELECT SQL_TEXT, SHARABLE_MEM, PERSISTENT_MEM, RUNTIME_MEM, SORTS,VERSION_COUNT, LOADED_VERSIONS, OPEN_VERSIONS, USERS_OPENING, EXECUTIONS,USERS_EXECUTING, LOADS, FIRST_LOAD_TIME, INVALIDATIONS, PARSE_CALLS, DISK_READS,BUFFER_GETS, ROWS_PROCESSED FROM V$SQLAREA 21。查看object分類數量select decode (o.type#,1,'INDEX' , 2,'TABLE' , 3 , 'CLUSTER' , 4, 'VIEW' , 5 ,'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) object_type , count(*) quantity fromsys.obj$ o where o.type# > 1 group by decode (o.type#,1,'INDEX' , 2,'TABLE' , 3, 'CLUSTER' , 4, 'VIEW' , 5 , 'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) union select'COLUMN' , count(*) from sys.col$/* union select 'DB LINK' , count(*) from*/ 22。按使用者查看object種類select u.name schema,   sum(decode(o.type#, 1, 1, NULL)) indexes,  sum(decode(o.type#, 2, 1, NULL)) tables,   sum(decode(o.type#, 3, 1, NULL))clusters,   sum(decode(o.type#, 4, 1, NULL)) views,   sum(decode(o.type#, 5, 1,NULL)) synonyms,   sum(decode(o.type#, 6, 1, NULL)) sequences,  sum(decode(o.type#, 1, NULL, 2, NULL, 3, NULL, 4, NULL, 5, NULL, 6, NULL, 1))others   from sys.obj$ o, sys.user$ u   where o.type# >= 1 and    u.user# =o.owner# and   u.name <> 'PUBLIC'   group by u.name    /*order by\*sys.link$ \*union select 'CONSTRAINT' , count(*) from sys.con$*\*\*/ 23。有關connection的相關資訊1）查看有哪些使用者串連select s.osuser os_user_name,    decode(sign(48 - command), 1, to_char(command),'Action Code #' || to_char(command) ) action,     p.program oracle_process,    status session_status,    s.terminal terminal,    s.program program,   s.username user_name,    s.fixed_table_sequence activity_meter,    '' query,   0 memory,    0 max_memory,     0 cpu_usage,    s.sid,   s.serial# serial_num   from v$session s,    v$process p   where s.paddr=p.addr and    s.type = 'USER' order by s.username, s.osuser2）根據v.sid查看對應串連的資源佔用等情況select n.name, v.value, n.class, n.statistic# from  v$statname n, v$sesstat vwhere v.sid = 71 and v.statistic# = n.statistic#order by n.class, n.statistic#3）根據sid查看對應串連正在啟動並執行sqlselect /*+ PUSH_SUBQ */ command_type, sql_text, sharable_mem, persistent_mem, runtime_mem, sorts, version_count, loaded_versions, open_versions, users_opening, executions, users_executing, loads, first_load_time, invalidations, parse_calls, disk_reads, buffer_gets, rows_processed, sysdate start_time, sysdate finish_time, '>' || address sql_address, 'N' statusfrom v$sqlareawhere address = (select sql_address from v$session where sid = 71)