| Name | Description |
| AD | ASM Disk AU Lock |
| AF | Advisor Framework |
| AG | Analytic Workspace Generation |
| AK | GES Deadlock Test |
| AO | MultiWriter Object Access |
| AS | Service Operations |
| AT | Alter Tablespace |
| AW | Analytic Workspace |
| BR | Backup/Restore |
| CF | Controlfile Transaction |
| CI | Cross-Instance Call Invocation |
| CL | Label Security cache |
| CM | ASM Instance Enqueue |
| CT | Block Change Tracking |
| CU | Cursor |
| DB | DbsDriver |
| DD | ASM Local Disk Group |
| DF | Datafile Online in RAC |
| DG | ASM Disk Group Modification |
| DI | GES Internal |
| DL | Direct Loader Index Creation |
| DM | Database Mount/Open |
| DN | Diskgroup number generator |
| DP | LDAP Parameter |
| DQ | ASM RBAL doorbell |
| DR | Distributed Recovery |
| DS | Database Suspend |
| DT | Default Temporary Tablespace |
| DV | Diana Versioning |
| DX | Distributed Transaction |
| E | Library Cache Lock 2 |
| FA | ASM File Access Lock |
| FB | Format Block |
| FC | Disk Group Chunk Mount |
| FD | Flashback Database |
| FG | ACD Relocation Gate Enqueue |
| FL | Flashback database log |
| FM | File Mapping |
| FR | Disk Group Recovery |
| FS | File Set / Dictionary Check |
| FT | Disk Group Redo Generation |
| FU | DBFUS |
| G | Library Cache Pin 2 |
| HD | ASM Disk Header |
| HP | Queue Page |
| HQ | Hash Queue |
| HV | Direct Loader High Water Mark |
| HW | Segment High Water Mark |
| IA | Internal |
| ID | NID |
| IL | Label Security |
| IM | Kti blr lock |
| IR | Instance Recovery |
| IS | Instance State |
| IT | In-Mem Temp Table Meta Creation |
| IV | Library Cache Invalidation |
| IZ | INSTANCE LOCK |
| JD | Job Queue Date |
| JI | Materialized View |
| JQ | Job Queue |
| JS | Job Scheduler |
| KK | Kick Instance to Switch Logs |
| KM | Scheduler |
| KP | Kupp Process Startup |
| KT | Scheduler Plan |
| L | Library Cache Lock 1 |
| MD | Materialized View Log DDL |
| MH | AQ Notification Mail Host |
| ML | AQ Notification Mail Port |
| MN | LogMiner |
| MR | Media Recovery |
| MS | Materialized View Refresh Log |
| MW | MWIN Schedule |
| N | Library Cache Pin 1 |
| OC | Outline Cache |
| OL | Outline Name |
| OQ | OLAPI Histories |
| PD | Property Lock |
| PE | Parameter |
| PF | Password File |
| PG | Global Parameter |
| PH | AQ Notification Proxy |
| PI | Remote PX Process Spawn Status |
| PL | Transportable Tablespace |
| PM | ASM PST Signalling |
| PR | Process Startup |
| PS | PX Process Reservation |
| PT | ASM Partnership and Status Table |
| PV | KSV slave startup |
| PW | Buffer Cache PreWarm |
| Q | Row Cache |
| RB | ASM Rollback Recovery |
| RF | Data Guard Broker |
| RM | GES Resource Remastering |
| RN | Redo Log Nab Computation |
| RO | Multiple Object Reuse |
| RP | Resilver / Repair |
| RS | Reclaimable Space |
| RT | Redo Thread |
| SB | LogicalStandby |
| SC | System Change Number |
| SF | AQ Notification Sender |
| SH | Active Session History Flushing |
| SI | Streams Table Instantiation |
| SK | Shrink Segment |
| SM | SMON Serialization |
| SQ | Sequence Cache |
| SR | Synchronized Replication |
| SS | Sort Segment |
| ST | Space Transaction |
| SU | SaveUndo Segment |
| SV | Sequence Ordering |
| SW | Suspend Writes |
| TA | Instance Undo |
| TB | SQL Tuning Base Existence Cache |
| TC | Tablespace Checkpoint |
| TD | KTF map table enqueue |
| TE | KTF broadcast |
| TF | Temporary File |
| TL | Log Lock |
| TM | DML |
| TO | Temp Object |
| TQ | Queue table enqueue |
| TS | Temporary Segment |
| TT | Tablespace |
| TW | Cross-Instance Transaction |
| TX | Transaction |
| UL | User-defined |
| UN | User Name |
| US | Undo Segment |
| WA | AQ Notification Watermark |
| WF | AWR Flush |
| WL | Being Written Redo Log |
| WP | AWR Purge |
| WS | LogWriter Standby |
| XH | AQ Notification No-Proxy |
| XR | Quiesce / Force Logging |
| XY | Internal Test |
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