Oracle 查看 session 现阶段统计信息 脚本 说明

Oracle 查看 session 当前统计信息 脚本 说明

一．相关说明

当我们在一个session 上进行事务操作时，如果我们想查看这个事务的相关统计信息，那么可以通过v$mystat ,v$sysstat, v$sesstat, v$statname 字典来查看。 在Oracle 11g中，通过这2个视图，我么可以查看到588个相关的统计信息。

SQL> select * from v$version; BANNER -------------------------------------------- Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production PL/SQL Release 11.2.0.1.0 - Production CORE 11.2.0.1.0 Production TNS for 64-bit Windows: Version 11.2.0.1.0 - Production NLSRTL Version 11.2.0.1.0 - Production SQL> SELECT COUNT (*) 2 FROM v$mystat vm, v$sysstat vs 3 WHERE vm.statistic# = vs.statistic#; COUNT(*) ---------- 588

v$mystat 字典只能查看当前session 的信息，而v$sesstat 可以查看所有session 的信息，v$sysstat和v$statname 是对统计信息的一个说明。如果不是SYS 用户来执行，那么就需要单独的对这些用户进行赋权操作，具体命令如下：

grant select on v_$mystat to anqing; grant select on v_$statname to anqing; grant select on v_$sesstat to anqing; grant select on v_$sysstat to anqing;

有关Oracle 视图的相关说明参考：

 

Oracle 性能相关的几个 视图 和 参数

http://blog.csdn.net/tianlesoftware/article/details/5867276

 

Oracle 动态性能视图

http://blog.csdn.net/tianlesoftware/article/details/5863191

 

二．查看当前session 的统计信息：v$mystat 和v$sysstat

我们可以通过如果SQL 来查看当前session 的具体统计信息，从而来帮助我们分析SQL 语句：

/* Formatted on 2012/6/25 10:57:20 (QP5 v5.185.11230.41888) */ SELECT vm.sid, vs.name, vm.VALUE FROM v$mystat vm, v$sysstat vs WHERE vm.statistic# = vs.statistic# AND vs.name IN ('cleanouts only - consistent read gets', 'session logical reads', 'physical reads', 'physical reads direct', 'redo size');

 

这个操作需要注意相关的权限问题。

 

 

三．查看所有session的统计信息：v$sessstat 和 v$statname

 

/* Formatted on 2012/6/25 12:39:51 (QP5 v5.185.11230.41888) */ SELECT a.sid, b.name, a.VALUE FROM v$sesstat a, v$statname b WHERE a.statistic# = b.statistic# AND b.name IN ('cleanouts only - consistent read gets', 'session logical reads', 'physical reads', 'physical reads direct', 'redo size');

这里我们也可以加上SID 条件，只查看某个session的的统计信息，获取SID的方法参考：

Oracle 查看当前会话 SESSION ID 方法 说明

http://blog.csdn.net/tianlesoftware/article/details/7240085

 

SELECT a.sid, b.name, a.VALUE FROM v$sesstat a, v$statname b WHERE a.statistic# = b.statistic# AND sid = 139 AND b.name IN ('cleanouts only - consistent read gets', 'session logical reads', 'physical reads', 'physical reads direct', 'redo size');

四．所有的统计信息列表

            在Oracle 11gR2中总共有588个相关的统计，我们可以根据自己的需要来查看相关的信息，这588个统计的所有列表如下：

 

SQL> SELECT vm.sid, vs.name, vm.VALUE 2 FROM v$mystat vm, v$sysstat vs 3 WHERE vm.statistic# = vs.statistic#; SID NAME VALUE ---------- ---------------------------- ---------- 139 OS CPU Qt wait time 0 139 logons cumulative 1 139 logons current 1 139 opened cursors cumulative 90 139 opened cursors current 2 139 user commits 0 139 user rollbacks 0 139 user calls 1180 139 recursive calls 957 139 recursive cpu usage 2 139 pinned cursors current 1 139 session logical reads 242 139 session stored procedure space 0 139 CPU used when call started 36 139 CPU used by this session 36 139 DB time 57 139 cluster wait time 0 139 concurrency wait time 0 139 application wait time 0 139 user I/O wait time 21 139 scheduler wait time 0 139 non-idle wait time 21 139 non-idle wait count 1184 139 session connect time 1340593250 139 process last non-idle time 1340593250 139 session uga memory 1524440 139 session uga memory max 1975392 139 messages sent 2 139 messages received 0 139 background timeouts 0 139 remote Oradebug requests 0 139 session pga memory 2387672 139 session pga memory max 2846424 139 recursive system API invocations 0 139 enqueue timeouts 0 139 enqueue waits 0 139 enqueue deadlocks 0 139 enqueue requests 16 139 enqueue conversions 0 139 enqueue releases 15 139 global enqueue gets sync 0 139 global enqueue gets async 0 139 global enqueue get time 0 139 global enqueue releases 0 139 physical read total IO requests 14 139 physical read total multi block requests 0 139 physical read requests optimized 0 139 physical read total bytes 114688 139 physical write total IO requests 0 139 physical write total multi block requests 0 139 physical write total bytes 0 139 cell physical IO interconnect bytes 114688 139 spare statistic 1 0 139 spare statistic 2 0 139 spare statistic 3 0 139 spare statistic 4 0 139 IPC CPU used by this session 0 139 gcs messages sent 0 139 ges messages sent 0 139 global enqueue CPU used by this session 0 139 max cf enq hold time 0 139 total cf enq hold time 0 139 total number of cf enq holders 0 139 db block gets 6 139 db block gets from cache 6 139 db block gets from cache (fastpath) 0 139 db block gets direct 0 139 consistent gets 236 139 consistent gets from cache 236 139 consistent gets from cache (fastpath) 119 139 consistent gets - examination 106 139 consistent gets direct 0 139 physical reads 14 139 physical reads cache 14 139 physical read flash cache hits 0 139 physical reads direct 0 139 physical read IO requests 14 139 physical read bytes 114688 139 db block changes 8 139 consistent changes 0 139 recovery blocks read 0 139 recovery blocks read for lost write detection 0 139 recovery blocks skipped lost write checks 0 139 physical writes 0 139 physical writes direct 0 139 physical writes from cache 0 139 physical write IO requests 0 139 flash cache inserts 0 139 physical reads direct temporary tablespace 0 139 physical writes direct temporary tablespace 0 139 physical write bytes 0 139 flash cache eviction: invalidated 0 139 flash cache eviction: buffer pinned 0 139 flash cache eviction: aged out 0 139 flash cache insert skip: not current 0 139 flash cache insert skip: DBWR overloaded 0 139 flash cache insert skip: exists 0 139 flash cache insert skip: not useful 0 139 flash cache insert skip: modification 0 139 flash cache insert skip: corrupt 0 139 db corrupt blocks detected 0 139 db corrupt blocks recovered 0 139 physical writes non checkpoint 0 139 summed dirty queue length 0 139 DBWR checkpoint buffers written 0 139 DBWR thread checkpoint buffers written 0 139 DBWR tablespace checkpoint buffers written 0 139 DBWR parallel query checkpoint buffers written 0 139 DBWR object drop buffers written 0 139 DBWR transaction table writes 0 139 DBWR undo block writes 0 139 DBWR revisited being-written buffer 0 139 DBWR lru scans 0 139 DBWR checkpoints 0 139 DBWR fusion writes 0 139 prefetch clients - keep 0 139 prefetch clients - recycle 0 139 prefetch clients - default 0 139 prefetch clients - 2k 0 139 prefetch clients - 4k 0 139 prefetch clients - 8k 0 139 prefetch clients - 16k 0 139 prefetch clients - 32k 0 139 change write time 0 139 redo synch writes 1 139 redo synch time 0 139 exchange deadlocks 0 139 free buffer requested 15 139 dirty buffers inspected 0 139 pinned buffers inspected 0 139 hot buffers moved to head of LRU 0 139 free buffer inspected 0 139 commit cleanout failures: write disabled 0 139 commit cleanout failures: block lost 0 139 commit cleanout failures: cannot pin 0 139 commit cleanout failures: hot backup in progress 0 139 commit cleanout failures: buffer being written 0 139 commit cleanout failures: callback failure 0 139 commit cleanouts 2 139 commit cleanouts successfully completed 2 139 recovery array reads 0 139 recovery array read time 0 139 CR blocks created 0 139 current blocks converted for CR 0 139 switch current to new buffer 1 139 write clones created in foreground 0 139 write clones created in background 0 139 write clones created for recovery 0 139 recovery block gets from cache 0 139 physical reads cache prefetch 0 139 physical reads prefetch warmup 0 139 prefetched blocks aged out before use 0 139 prefetch warmup blocks aged out before use 0 139 prefetch warmup blocks flushed out before use 0 139 physical reads retry corrupt 0 139 physical reads direct (lob) 0 139 physical writes direct (lob) 0 139 cold recycle reads 0 139 shared hash latch upgrades - no wait 3 139 shared hash latch upgrades - wait 0 139 physical reads for flashback new 0 139 calls to kcmgcs 11 139 calls to kcmgrs 0 139 calls to kcmgas 3 139 calls to get snapshot scn: kcmgss 94 139 redo blocks read for recovery 0 139 redo k-bytes read for recovery 0 139 redo k-bytes read for terminal recovery 0 139 redo entries 4 139 redo size 1756 139 redo entries for lost write detection 0 139 redo size for lost write detection 0 139 redo size for direct writes 0 139 redo buffer allocation retries 0 139 redo wastage 0 139 redo writes 0 139 redo blocks written 0 139 redo write time 0 139 redo blocks checksummed by FG (exclusive) 0 139 redo blocks checksummed by LGWR 0 139 redo log space requests 0 139 redo log space wait time 0 139 redo ordering marks 0 139 redo subscn max counts 0 139 redo write broadcast ack time 0 139 redo write broadcast ack count 0 139 redo k-bytes read total 0 139 redo k-bytes read (memory) 0 139 redo k-bytes read total by LNS 0 139 redo k-bytes read (memory) by LNS 0 139 file io service time 0 139 file io wait time 210653 139 gc cr blocks served 0 139 gc cr block read wait time 0 139 gc cr block build time 0 139 gc cr block flush time 0 139 gc cr block send time 0 139 gc current blocks served 0 139 gc current block pin time 0 139 gc current block flush time 0 139 gc current block send time 0 139 gc cr blocks received 0 139 gc cr block receive time 0 139 gc current blocks received 0 139 gc current block receive time 0 139 gc local grants 0 139 gc remote grants 0 139 gc kbytes sent 0 139 gc kbytes saved 0 139 gc blocks compressed 0 139 gc blocks lost 0 139 gc claim blocks lost 0 139 gc blocks corrupt 0 139 gc CPU used by this session 0 139 gc reader bypass grants 0 139 total number of slots 0 139 Effective IO time 0 139 Number of read IOs issued 0 139 background checkpoints started 0 139 background checkpoints completed 0 139 number of map operations 0 139 number of map misses 0 139 flashback log writes 0 139 flashback log write bytes 0 139 cell physical IO bytes saved during optimized file creation 0 139 cell physical IO bytes saved during optimized RMAN file restore 0 139 cell physical IO bytes eligible for predicate offload 0 139 cell physical IO bytes saved by storage index 0 139 cell smart IO session cache lookups 0 139 cell smart IO session cache hits 0 139 cell smart IO session cache soft misses 0 139 cell smart IO session cache hard misses 0 139 cell smart IO session cache hwm 0 139 cell num smart IO sessions in rdbms block IO due to user 0 139 cell num smart IO sessions in rdbms block IO due to big payload 0 139 cell num smart IO sessions using passthru mode due to user 0 139 cell num smart IO sessions using passthru mode due to cellsrv 0 139 cell num smart IO sessions using passthru mode due to timezone 0 139 cell num smart file creation sessions using rdbms block IO mode 0 139 cell physical IO interconnect bytes returned by smart scan 0 139 cell session smart scan efficiency 0 139 Batched IO vector read count 0 139 Batched IO vector block count 0 139 Batched IO single block count 0 139 Batched IO zero block count 0 139 Batched IO block miss count 0 139 Batched IO double miss count 0 139 Batched IO (full) vector count 0 139 Batched IO (space) vector count 0 139 Batched IO (bound) vector count 0 139 Batched IO same unit count 0 139 Batched IO buffer defrag count 0 139 Batched IO slow jump count 0 139 shared io pool buffer get success 0 139 shared io pool buffer get failure 0 139 temp space allocated (bytes) 0 139 serializable aborts 0 139 transaction lock foreground requests 0 139 transaction lock foreground wait time 0 139 transaction lock background gets 0 139 transaction lock background get time 0 139 undo change vector size 492 139 transaction tables consistent reads - undo records applied 0 139 transaction tables consistent read rollbacks 0 139 data blocks consistent reads - undo records applied 0 139 no work - consistent read gets 119 139 cleanouts only - consistent read gets 0 139 rollbacks only - consistent read gets 0 139 cleanouts and rollbacks - consistent read gets 0 139 RowCR attempts 0 139 RowCR hits 0 139 RowCR - row contention 0 139 RowCR - resume 0 139 rollback changes - undo records applied 0 139 transaction rollbacks 0 139 immediate (CURRENT) block cleanout applications 0 139 immediate (CR) block cleanout applications 0 139 deferred (CURRENT) block cleanout applications 1 139 commit txn count during cleanout 0 139 active txn count during cleanout 0 139 cleanout - number of ktugct calls 0 139 immediate CR cleanouts (index blocks) 0 139 deferred CUR cleanouts (index blocks) 0 139 Commit SCN cached 0 139 Cached Commit SCN referenced 0 139 Block Cleanout Optim referenced 0 139 min active SCN optimization applied on CR 0 139 auto extends on undo tablespace 0 139 drop segment calls in space pressure 0 139 total number of undo segments dropped 0 139 doubling up with imu segment 0 139 tune down retentions in space pressure 0 139 steps of tune down ret. in space pressure 0 139 space was found by tune down 0 139 space was not found by tune down 0 139 commit batch/immediate requested 0 139 commit batch requested 0 139 commit immediate requested 0 139 commit batch/immediate performed 0 139 commit batch performed 0 139 commit immediate performed 0 139 commit wait/nowait requested 0 139 commit nowait requested 0 139 commit wait requested 0 139 commit wait/nowait performed 0 139 commit nowait performed 0 139 commit wait performed 0 139 global undo segment hints helped 0 139 global undo segment hints were stale 0 139 local undo segment hints helped 0 139 local undo segment hints were stale 0 139 undo segment header was pinned 0 139 IMU commits 0 139 IMU Flushes 0 139 IMU contention 0 139 IMU recursive-transaction flush 0 139 IMU undo retention flush 0 139 IMU ktichg flush 0 139 IMU bind flushes 0 139 IMU mbu flush 0 139 IMU pool not allocated 0 139 IMU CR rollbacks 0 139 IMU undo allocation size 144 139 IMU Redo allocation size 0 139 IMU- failed to get a private strand 0 139 Misses for writing mapping 0 139 segment dispenser load tasks 0 139 segemnt dispenser load empty 0 139 segment dispenser allocations 0 139 segment cfs allocations 0 139 segment chunks allocation from disepnser 0 139 segment total chunk allocation 0 139 TBS Extension: tasks created 0 139 TBS Extension: tasks executed 0 139 TBS Extension: files extended 0 139 TBS Extension: bytes extended 0 139 total number of times SMON posted 0 139 SMON posted for undo segment recovery 0 139 SMON posted for txn recovery for other instances 0 139 SMON posted for instance recovery 0 139 SMON posted for undo segment shrink 0 139 SMON posted for dropping temp segment 0 139 segment prealloc tasks 0 139 segment prealloc ops 0 139 segment prealloc bytes 0 139 segment prealloc time (ms) 0 139 segment prealloc ufs2cfs bytes 0 139 table scans (short tables) 4 139 table scans (long tables) 0 139 table scans (rowid ranges) 0 139 table scans (cache partitions) 0 139 table scans (direct read) 0 139 table scan rows gotten 80 139 table scan blocks gotten 3 139 table fetch by rowid 58 139 table fetch continued row 0 139 cluster key scans 16 139 cluster key scan block gets 16 139 rows fetched via callback 4 139 cell scans 0 139 cell blocks processed by cache layer 0 139 cell blocks processed by txn layer 0 139 cell blocks processed by data layer 0 139 cell blocks processed by index layer 0 139 cell commit cache queries 0 139 cell transactions found in commit cache 0 139 cell blocks helped by commit cache 0 139 cell blocks helped by minscn optimization 0 139 cell blocks skipped due to chained rows 0 139 cell simulated physical IO bytes eligible for predicate offload 0 139 cell simulated physical IO bytes returned by predicate offload 0 139 cell simulated session smart scan efficiency 0 139 cell CUs sent uncompressed 0 139 cell CUs sent compressed 0 139 cell CUs sent head piece 0 139 cell CUs processed for uncompressed 0 139 cell CUs processed for compressed 0 139 cell IO uncompressed bytes 0 139 queue update without cp update 0 139 index crx upgrade (prefetch) 0 139 index crx upgrade (found) 0 139 index crx upgrade (positioned) 0 139 leaf node splits 0 139 leaf node 90-10 splits 0 139 branch node splits 0 139 root node splits 0 139 failed probes on index block reclamation 0 139 recursive aborts on index block reclamation 0 139 index reclamation/extension switch 0 139 native hash arithmetic execute 0 139 native hash arithmetic fail 0 139 lob reads 0 139 lob writes 0 139 lob writes unaligned 0 139 cell index scans 0 139 index fast full scans (full) 0 139 index fast full scans (rowid ranges) 0 139 index fast full scans (direct read) 0 139 index fetch by key 24 139 index scans kdiixs1 44 139 queue splits 0 139 queue flush 0 139 queue position update 0 139 queue single row 0 139 queue ocp pages 0 139 queue qno pages 0 139 heap block compress 0 139 HSC OLTP Space Saving 0 139 HSC OLTP Compressed Blocks 0 139 HSC IDL Compressed Blocks 0 139 HSC Compressed Segment Block Changes 0 139 HSC Heap Segment Block Changes 2 139 HSC OLTP Non Compressible Blocks 0 139 HSC OLTP positive compression 0 139 HSC OLTP negative compression 0 139 HSC OLTP recursive compression 0 139 HSC OLTP inline compression 0 139 HSC OLTP Drop Column 0 139 HSC OLTP Compression skipped rows 0 139 HSC OLTP compression block checked 0 139 Heap Segment Array Inserts 0 139 Heap Segment Array Updates 0 139 securefile allocation bytes 0 139 securefile allocation chunks 0 139 securefile direct read bytes 0 139 securefile direct write bytes 0 139 securefile direct read ops 0 139 securefile direct write ops 0 139 securefile inode read time 0 139 securefile inode write time 0 139 securefile inode ioreap time 0 139 securefile bytes non-transformed 0 139 securefile number of non-transformed flushes 0 139 securefile bytes encrypted 0 139 securefile bytes cleartext 0 139 securefile compressed bytes 0 139 securefile uncompressed bytes 0 139 securefile bytes deduplicated 0 139 securefile create dedup set 0 139 securefile destroy dedup set 0 139 securefile add dedupd lob to set 0 139 securefile rmv from dedup set 0 139 securefile reject deduplication 0 139 securefile dedup prefix hash match 0 139 securefile number of flushes 0 139 securefile dedup flush too low 0 139 securefile dedup callback oper final 0 139 securefile dedup hash collision 0 139 securefile dedup fits inline 0 139 CC CUs Compressed 0 139 CC Query Low CUs Compressed 0 139 CC Query High CUs Compressed 0 139 CC Archive CUs Compressed 0 139 CC Compressed Length Compressed 0 139 CC Decompressed Length Compressed 0 139 CC Rows Compressed 0 139 CC Rows Not Compressed 0 139 CC CU Row Pieces Compressed 0 139 CC CUs Decompressed 0 139 CC Query Low CUs Decompressed 0 139 CC Query High CUs Decompressed 0 139 CC Archive CUs Decompressed 0 139 CC Compressed Length Decompressed 0 139 CC Decompressed Length Decompressed 0 139 CC Columns Decompressed 0 139 CC Total Columns for Decompression 0 139 CC Total Rows for Decompression 0 139 CC Pieces Buffered for Decompression 0 139 CC Total Pieces for Decompression 0 139 CC DML CUs Decompressed 0 139 CC Scan CUs Decompressed 0 139 CC Turbo Scan CUs Decompressed 0 139 CC Rowid CUs Decompressed 0 139 CC Analyze CUs Decompressed 0 139 CC Dump CUs Decompressed 0 139 CC Check CUs Decompressed 0 139 CC Analyzer Calls 0 139 sql area purged 2 139 sql area evicted 0 139 CCursor + sql area evicted 0 139 No. of Encrypt ops 0 139 No. of Decrypt ops 0 139 No. of XS Sessions Created 0 139 No. of XS Sessions Attached 0 139 No. of Namespaces Created 0 139 No. of User Callbacks Executed 0 139 No. of Roles Enabled or Disabled 0 139 No. of Principal Cache Misses 0 139 No. of Principal Invalidations 0 139 DX/BB enqueue lock foreground requests 0 139 DX/BB enqueue lock foreground wait time 0 139 DX/BB enqueue lock background gets 0 139 DX/BB enqueue lock background get time 0 139 Clusterwide global transactions 0 139 Clusterwide global transactions spanning RAC nodes 0 139 Forwarded 2PC commands across RAC nodes 0 139 GTX processes spawned by autotune 0 139 GTX processes stopped by autotune 0 139 session cursor cache hits 36 139 session cursor cache count 20 139 java call heap total size 0 139 java call heap total size max 0 139 java call heap used size 0 139 java call heap used size max 0 139 java call heap live size 0 139 java call heap live size max 0 139 java call heap object count 0 139 java call heap object count max 0 139 java call heap live object count 0 139 java call heap live object count max 0 139 java call heap gc count 0 139 java call heap collected count 0 139 java call heap collected bytes 0 139 java session heap used size 0 139 java session heap used size max 0 139 java session heap live size 0 139 java session heap live size max 0 139 java session heap object count 0 139 java session heap object count max 0 139 java session heap live object count 0 139 java session heap live object count max 0 139 java session heap gc count 0 139 java session heap collected count 0 139 java session heap collected bytes 0 139 cursor authentications 8 139 queries parallelized 0 139 DML statements parallelized 0 139 DDL statements parallelized 0 139 DFO trees parallelized 0 139 Parallel operations not downgraded 0 139 Parallel operations downgraded to serial 0 139 Parallel operations downgraded 75 to 99 pct 0 139 Parallel operations downgraded 50 to 75 pct 0 139 Parallel operations downgraded 25 to 50 pct 0 139 Parallel operations downgraded 1 to 25 pct 0 139 PX local messages sent 0 139 PX local messages recv'd 0 139 PX remote messages sent 0 139 PX remote messages recv'd 0 139 buffer is pinned count 9 139 buffer is not pinned count 194 139 no buffer to keep pinned count 0 139 workarea memory allocated 1245 139 workarea executions - optimal 17 139 workarea executions - onepass 0 139 workarea executions - multipass 0 139 LOB table id lookup cache misses 0 139 parse time cpu 3 139 parse time elapsed 26 139 parse count (total) 87 139 parse count (hard) 8 139 parse count (failures) 2 139 parse count (describe) 0 139 frame signature mismatch 0 139 execute count 97 139 bytes sent via SQL*Net to client 384449 139 bytes received via SQL*Net from client 20349 139 SQL*Net roundtrips to/from client 1164 139 bytes sent via SQL*Net to dblink 0 139 bytes received via SQL*Net from dblink 0 139 SQL*Net roundtrips to/from dblink 0 139 bytes via SQL*Net vector to client 0 139 bytes via SQL*Net vector from client 0 139 bytes via SQL*Net vector to dblink 0 139 bytes via SQL*Net vector from dblink 0 139 sorts (memory) 39 139 sorts (disk) 0 139 sorts (rows) 21 139 OTC commit optimization attempts 0 139 OTC commit optimization hits 0 139 OTC commit optimization failure - setup 0 139 cell flash cache read hits 0 139 Workload Capture: size (in bytes) of recording 0 139 Workload Capture: dbtime 0 139 Workload Capture: user calls 0 139 Workload Capture: user calls flushed 0 139 Workload Capture: unreplayable user calls 0 139 Workload Capture: user txns 0 139 Workload Capture: user logins 0 139 Workload Capture: unsupported user calls 0 139 Workload Capture: errors 0 139 Workload Replay: dbtime 0 139 Workload Replay: network time 0 139 Workload Replay: think time 0 139 Workload Replay: time gain 0 139 Workload Replay: time loss 0 139 Workload Replay: user calls 0 139 Workload Replay: deadlocks resolved 0 588 rows selected. SQL>

 

 

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