Sessions

Sessions

Columns

Name Description
SID Session ID
Serial# Session serial #
User Login name
Status Status (ACTIVE, CACHED, INACTIVE, KILLED, SNIPED)
Last Command General command type name; see view AUDIT_ACTIONS for possible values
Logical I/O Delta number of logical reads + Delta number of physical writes
Program Application name
CPU % (One CPU) CPU % Used (1 CPU), in interval
Cache Miss % Data cache miss %, or how often logical reads required physical reads
Blk Cnt Approximate number of sessions being blocked by this session
Blked By Session ID of blocker session, if applicable
Blked By Inst Name Instance name of blocker session, if applicable
Module Application module name
Client Info Application client info
Action Application action
Terminal Client host name
Server Server type (DEDICATED, NONE, PSEUDO, SHARED); the usual value is DEDICATED
PID Oracle process ID; not related to OS process ID
SPID OS Process ID (PID) for session; not unique if threaded_execution = TRUE (not related to MTS / SHARED server type)
Server OS User OS process user name for session
Client OS User Client OS user name
Logon Time Login time
Event Current wait event, if applicable
Wait Time if waiting: duration of wait time; if not waiting: duration of time since session switched between ACTIVE and INACTIVE states (either way)
Memory KBytes Memory usage, in kilobytes [(session pga memory + session uga memory) / 1024]
Since Last Call Duration of time since session switched between ACTIVE and INACTIVE states (either way)
SQL ID SQL ID
Child # Child # for the SQL; one SQL statement may have multiple child cursors due to environment differences between sessions

SQL Plan - Columns

Name Description
ID ID # of the SQL plan step
Parent Parent ID # of the SQL plan step
Query Plan Text of the SQL plan step
% Time % of total elapsed time, in last execution; use this to find bottlenecks in the query plan
Output Rows Number of output rows for the SQL plan step, since instance started
Est Bytes Internal estimate of the output size (bytes), of the SQL plan step
Disk Reads Number of physical disk reads, in the last execution
Disk Writes Number of physical disk writes, in the last execution
Est Card Internal cardinality (number of output rows) estimate of the SQL plan step
Est Cost Internal cost estimate of the SQL plan step
Access Predicates Access predicates
Filter Predicates Filter predicates

Entity Requirements

Attributes: None
Minimum database version: 8.1