知识大全 Oracle维护常用SQL语句二

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数据库手册:Oracle维护常用SQL语句二  以下文字资料是由(全榜网网www.cha138.com)小编为大家搜集整理后发布的内容,让我们赶快一起来看一下吧!

   回滚段查看    select rownum sys dba_rollback_segs segment_name Name v$rollstat extents    Extents v$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$rollname name(+) = sys dba_rollback_segs segment_name and    v$rollstat usn (+) = v$rollname usn order by rownum     耗资源的进程(top session)    select s schemaname schema_name decode(sign( mand)     to_char(mand) Action Code # || to_char(mand) ) action status    session_status s osuser os_user_name s sid p spid s serial# serial_num     nvl(s username [Oracle process] ) user_name s terminal terminal     s program program st value criteria_value from v$sesstat st v$session s v$process p    where st sid = s sid and st statistic# = to_number( ) 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     查看锁(lock)情况    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 null Row Share      Row Exclusive Share Share Row Exclusive Exclusive null)    lock_mode o owner ls sid ls serial# serial_num ls id ls id     from sys dba_objects o ( select s osuser s username l type     l lmode s sid s serial# l id l id from v$session s     v$lock l where s sid = l sid ) ls where o object_id = ls id and o owner    <> SYS order by o owner o object_name     查看等待(wait)情况    SELECT v$waitstat class v$unt count SUM(v$sysstat value) sum_value    FROM v$waitstat v$sysstat WHERE v$sysstat name IN ( db block gets      consistent gets ) group by v$waitstat class v$unt     查看sga情况    SELECT NAME BYTES FROM SYS V_$SGASTAT ORDER BY NAME ASC     查看catched object    SELECT owner name db_link namespace     type sharable_mem loads executions     locks pins kept FROM v$db_object_cache     查看V$SQLAREA    SELECT SQL_TEXT SHARABLE_MEM PERSISTENT_MEM RUNTIME_MEM SORTS     VERSION_COUNT LOADED_VERSIONS OPEN_VERSIONS USERS_OPENING EXECUTIONS     USERS_EXECUTING LOADS FIRST_LOAD_TIME INVALIDATIONS PARSE_CALLS DISK_READS     BUFFER_GETS ROWS_PROCESSED FROM V$SQLAREA     查看object分类数量    select decode (o type# INDEX TABLE CLUSTER VIEW      SYNONYM SEQUENCE OTHER ) object_type count(*) quantity from    sys obj$ o where o type# > group by decode (o type# INDEX TABLE      CLUSTER VIEW SYNONYM SEQUENCE OTHER ) union select     COLUMN count(*) from l$ union select DB LINK count(*) from     按用户查看object种类    select u name schema sum(decode(o type# NULL)) indexes     sum(decode(o type# NULL)) tables sum(decode(o type# NULL))    clusters sum(decode(o type# NULL)) views sum(decode(o type#     NULL)) synonyms sum(decode(o type# NULL)) sequences     sum(decode(o type# NULL NULL NULL NULL NULL NULL ))    others from sys obj$ o sys user$ u where o type# >= and u user# =    o owner# and u name <> PUBLIC group by u name order by    sys link$ union select CONSTRAINT count(*) from n$     有关connection的相关信息     )查看有哪些用户连接    select s osuser os_user_name decode(sign( mand) to_char(mand)      Action Code # || to_char(mand) ) 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      memory max_memory 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 osuser     )根据v sid查看对应连接的资源占用等情况    select n name     v value     n class     n statistic#    from v$statname n     v$sesstat v    where v sid = and    v statistic# = n statistic#    order by n class n statistic#     )根据sid查看对应连接正在运行的sql    select /*+ PUSH_SUBQ */    mand_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 status    from v$sqlarea    where address = (select sql_address from v$session where sid = )     查询表空间使用情况select a tablespace_name 表空间名称      round((nvl(b bytes_free )/a bytes_alloc)* ) 占用率(%)     round(a bytes_alloc/ / ) 容量(M)     round(nvl(b bytes_free )/ / ) 空闲(M)     round((a bytes_alloc nvl(b bytes_free ))/ / ) 使用(M)     Largest 最大扩展段(M)     to_char(sysdate yyyy mm dd hh :mi:ss ) 采样时间     from (select f tablespace_name     sum(f bytes) bytes_alloc     sum(decode(f autoextensible YES f maxbytes NO f bytes)) maxbytes    from dba_data_files f    group by tablespace_name) a     (select f tablespace_name     sum(f bytes) bytes_free    from dba_free_space f    group by tablespace_name) b     (select round(max(ff length)* / ) Largest     ts name tablespace_name    from sys fet$ ff sys file$ tf sys ts$ ts    where ts ts#=ff ts# and ff file#=tf relfile# and ts ts#=tf ts#    group by ts name tf blocks) c    where a tablespace_name = b tablespace_name and a tablespace_name = c tablespace_name     查询表空间的碎片程度    select tablespace_name count(tablespace_name) from dba_free_space group by tablespace_name    having count(tablespace_name)> ;    alter tablespace name coalesce;    alter table name deallocate unused;    create or replace view ts_blocks_v as    select tablespace_name block_id bytes blocks free space segment_name from dba_free_space    union all    select tablespace_name block_id bytes blocks s cha138/Article/program/Oracle/201311/18531

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