11g新特性UTS TRACE是比10g中引入的KST TRACE更强力内部诊断工具， 有了UTS和KST这2现代化个debugger工具， 我们差不多可以扔掉gdb和dtrace的拐杖了。
今后会继续介绍UTS和KST TRACE的使用方法，让任何人都有机会了解Oracle的内部运行原理。
以下是UTS trace events 的列表，可以利用oradebug doc component rdbms列出:
SQL> select * from v$version;
BANNER
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Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
SQL> oradebug doc component rdbms
Components in library RDBMS:
--------------------------
SQL_Compiler SQL Compiler
SQL_Parser SQL Parser (qcs)
SQL_Semantic SQL Semantic Analysis (kkm)
SQL_Optimizer SQL Optimizer
SQL_Transform SQL Transformation (kkq, vop, nso)
SQL_MVRW SQL Materialized View Rewrite
SQL_VMerge SQL View Merging (kkqvm)
SQL_Virtual SQL Virtual Column (qksvc, kkfi)
SQL_APA SQL Access Path Analysis (apa)
SQL_Costing SQL Cost-based Analysis (kko, kke)
SQL_Parallel_Optimization SQL Parallel Optimization (kkopq)
SQL_Code_Generator SQL Code Generator (qka, qkn, qke, kkfd, qkx)
SQL_Parallel_Compilation SQL Parallel Compilation (kkfd)
SQL_Expression_Analysis SQL Expression Analysis (qke)
SQL_Plan_Management SQL Plan Managment (kkopm)
MPGE MPGE (qksctx)
SQL_Execution SQL Execution (qer, qes, kx, qee)
Parallel_Execution Parallel Execution (qerpx, qertq, kxfr, kxfx, kxfq, kxfp)
PX_Messaging Parallel Execution Messaging (kxfp)
PX_Group Parallel Execution Slave Group (kxfp)
PX_Affinity Parallel Affinity (ksxa)
PX_Buffer Parallel Execution Buffers (kxfpb)
PX_Granule Parallel Execution Granules (kxfr)
PX_Control Parallel Execution Control (kxfx)
PX_Table_Queue Parallel Execution Table Queues (kxfq)
PX_Scheduler Parallel Execution Scheduler (qerpx)
PX_Queuing Parallel Execution Queuing (kxfxq)
Bloom_Filter Bloom Filter (qerbl, qesbl)
PX_Blackbox Parallel Execution Blackbox (kxf)
PGA_Manage PGA Memory Management
PGA_Compile PGA Memory Compilation
PGA_IMM PGA Memory Instance Manage
PGA_CMM PGA Memory Cursor Manage
PGA_ADV PGA Memory Advisor
rdbms_dde RDBMS Diagnostic Data Extractor (dbke)
VOS VOS (ks)
hang_analysis Hang Analysis (ksdhng)
background_proc Background Processes (ksb, ksbt)
system_param System Parameters (ksp, kspt)
ksu Kernel Service User (ksu)
ksutac KSU Timeout Actions
ksv_trace Kernel Services Slave Management (ksv)
sql_mon SQL Monitor (keswx)
sql_mon_deamon SQL Monitor Deamon
sql_mon_query SQL Monitor Query
CACHE_RCV Cache Recovery (kcv, kct, kcra, kcrp, kcb)
DIRPATH_LOAD Direct Path Load (kl, kdbl, kpodp)
DIRPATH_LOAD_BIS Direct Path Kpodpbis Routine (kpodp)
RAC Real Application Clusters
GES Global Enqueue Service
GCS Global Cache Service (kjb)
GSIPC Global Enqueue/Cache Service IPC
KSI Kernel Service Instance locking (ksi)
RAC_ENQ Enqueue Operations
RAC_RCFG Reconfiguration
RAC_DRM Dynamic Remastering
RAC_MRDOM Multiple Recovery Domains
CGS Cluster Group Services (kjxg)
CGSIMR Instance Membership Recovery (kjxgr)
DD GES Deadlock Detection
GCS_BSCN Broadcast SCN (kjb, kcrfw)
RAC_WLM Work Load Management (wlm)
RAC_MLMDS RAC Multiple LMS (kjm)
GCS_READMOSTLY GCS Read-mostly (kjb)
GCS_READER_BYPASS GCS Reader Bypass (kjb)
GCS_DELTAPUSH GCS Delta Push (kjb)
RAC_BCAST Enqueue Broadcast Operations
db_trace RDBMS server only tracing
kst server trace layer tracing (kst)
ddedmp RDBMS Diagnostic Data Extractor Dumper (dbked)
cursor Shared Cursor (kxs, kks)
Bind_Capture Bind Capture Tracing
KSM Kernel Service Memory (ksm)
KSE Kernel Service Error Manager (kse)
explain SQL Explain Plan (xpl)
rdbms_event RDBMS Events (dbkd)
LOB_INODE Lob Inode (kdli)
rdbms_adr RDBMS ADR (dbkr)
ASM Automatic Storage Management (kf)
KFK KFK (kfk)
KFKIO KFK IO (kfkio)
KFKSB KFK subs (kfksubs)
KFN ASM Networking subsystem (kfn)
KFNU ASM Umbillicus (kfnm, kfns, kfnb)
KFNS ASM Server networking (kfns)
KFNC ASM Client networking (kfnc)
KFIS ASM Intelligent Storage interfaces (kfis)
KFM ASM Node Monitor Interface Implementation (kfm)
KFMD ASM Node Monitor Layer for Diskgroup Registration (kfmd)
KFMS ASM Node Monitor Layers Support Function Interface (kfms)
KFFB ASM Metadata Block (kffb)
KFFD ASM Metadata Directory (kffd)
KFZ ASM Zecurity subsystem (kfz)
KFC ASM Cache (kfc)
KFR ASM Recovery (kfr)
KFE ASM attributes (kfe)
KFDP ASM PST (kfdp)
KFG ASM diskgroups (kfg)
KFDS ASM staleness registry and resync (kfds)
DML DML Drivers (ins, del, upd)
Health_Monitor Health Monitor
DRA Data Repair Advisor
DIRACC Direct access to fixed tables (kqfd)
ASH Active Session History (kewa)
PART Partitioning (kkpo, qespc, qesma, kkpa, qergi)
PART_IntPart Interval Partitioning
PART_Dictionary Partitioning Dictionary (kkpod)
LOB_KDLW Lob kdlw (kdlw)
LOB_KDLX Lob xfm (kdlx)
LOB_KDLXDUP Lob dedup (kdlxdup)
LOB_KDLRCI Lob rci (kdlrci)
LOB_KDLA SecureFile Archive (kdla)
SQL_Manage SQL Manageability (kes)
SQL_Manage_Infra Other SQL Manageability Infrastructure (kesai, kesqs, kesatm, kesutl, kessi, keswat, keswts, keswsq)
SQL_Tune SQL Tuning Advisor (kest)
SQL_Tune_Auto SQL Tuning Advisor (auto-tune) (kestsa)
SQL_Tune_Index SQL Tuning Advisor (index-tune) (kestsi)
SQL_Tune_Plan SQL Tuning Advisor (plan node analysis) (kestsp)
SQL_Tune_Px SQL Tuning Advisor (parallel execution) (kestsa)
SQL_Tune_Fr SQL Tuning Advisor (fix regression) (kestsa)
SQL_Test_Exec SQL Test-Execute Service (kestse)
SQL_Perf SQL Performance Analyzer (kesp, keswpi)
SQL_Repair SQL Repair Advisor (kesds)
Auto_Tune_Opt Auto Tuning Optimizer (kkoat)
SQL_trace_parser SQL trace parser (kesstp)
SQL_Analyze SQL Analyze (qksan)
SQL_DS SQL Dynamic Sampling Services (qksds)
SQL_DDL SQL DDL (atb, ctc, dtb)
RAT_WCR Real Application Test: Workload Capture and Replay (kec)
Spatial Spatial (md)
Spatial_IND Spatial Indexing (mdr)
Spatial_GR Spatial GeoRaster (mdgr)
Text Text (dr)
rdbms_gc RDBMS Diagnostic Generic Configuration (dbkgc)
XS XS Fusion Security (kzx)
XSSESSION XS Session (kzxs)
XSPRINCIPAL XS Principal (kzxu)
XSSECCLASS XS Security Class (kzxc)
XSXDS XS Data Security (kzxd)
XSVPD XS VPD
XSXDB_DEFAULT XS XDB
XS_MIDTIER XS Midtier (kpuzxs)
AQ Streams Advanced Queuing (kwq, kkcn, kpon, kpoaq, kpce, kpcm, kpun, kpuaq)
AQ_DEQ Streams Advanced Queuing Dequeue (kwqid, kwqdl)
AQ_TM Streams Advanced Queuing Time Manager (kwqit, kwqmn)
KSFM Kernel Service File Mapping (ksfm)
KXD Exadata specific Kernel modules (kxd)
KXDAM Exadata Disk Auto Manage (kxdam)
KCFIS Exadata Predicate Push (kcfis)
NSMTIO Trace Non Smart I/O (nsmtio)
DV Database Vault (kzv)