Section 1- oratop and database/instance specifics
spid :oratop's server SPID connected to instance,
SID :instance name (First 4 letters),
clock :Time of current stats collected (hh24:mi:ss)
time :uptime since this instance startup,
ins :Total number of active database instance(s),
MT :database total memory (sum Memory_Target),
ses :Total user's sessions,
usr :Total distinct database foreground (F/G) users,
%DB :%database Active, 0 0ndicate idle db
Section 2- Cluster-wide "Top 5 instances activity" ordered by Wait Time
ID :instance id,
%HC :Host CPU Utilization, %(busy/busy+idle),
HLD :Current Host Load,
MBPS :throughput, 'I/O Megabytes per Second',
%FR :Shared Pool Free %,
PGAU :total PGA inuse,
IORL :Avg Synchronous Single-Block Read Latency,
PQS :PQ Slave Session Count,
ASC :Active Sessions on CPU,
ASI :Active Sessions waiting on user i/o,
ASW :Active Sessions waiting/sleeping,
AST :Total Active Sessions,
ASB :Active Sessions blocked,
AAS :Average Active Sessions,
CTPS :(CPS) User Calls Per Sec, OR, (TPS) User Transactions Per Sec (appears in RED),
SSRT :SQl service Response time,
DBC :database cpu time ratio,
DBW :database wait time ratio.
Section 3- Cluster-wide "Top 5 Timed Events" ordered by Wait Time
EVENT :database wait event,
WAITS :cluster average Total waits,
TIME(s) :cluster average Total wait time in seconds),
AVG_MS ::cluster Average wait time in milliseconds,
PCT :Percent of wait time,
WAIT_CLASS :Name of the wait class corresponding to the event.
Section 4- Session/process none-idle ordered by Wait Time desc.
ID :instance id,
SID :session id,
SPID :server process os pid,
USR :user name (abbreviated),
PROG :program name (abbreviated),
PGA :process pga used,
OPN :OPERATION name, e.g. SELECT,
SQLID :SQL identifier if no blocker, else,
/BLOCKR :final blocking instance:session:ospid,
E/T :Elapsed Time since the session has become active. Units: (s)econds, (M)inutes, (h)our, (d)ay.
STATUS :ACTIVE | INACTIVE | KILLED | CACHED | SNIPED,
STE :Process STATE: ON CPU or USR I/O or WAITING,
WAIT_EVENT :process wait event name,
W/T :Wait Time. Units: (u)-micro second, (m)illi second, (s)econds, (M)inutes, (h)our, (d)ay.