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ALTER PROFILE
Edit the resource limits associated with a user profile

Syntax:
  ALTER PROFILE profile_name LIMIT limit(s) range

KEY
  limit  =  
SESSIONS_PER_USER --Number of concurrent multiple sessions allowed per user
CPU_PER_SESSION      --Maximum CPU time per session (100ths of a second)
CPU_PER_CALL             --Maximum CPU time per call (100ths of a second)
CONNECT_TIME              --Allowable connect time per session in minutes
IDLE_TIME                        --Allowed idle time before user is disconnected (minutes)
LOGICAL_READS_PER_SESSION  --Maximum number of database blocks read per session
LOGICAL_READS_PER_CALL         --Maximum number of database blocks read per call
COMPOSITE_LIMIT         --Maximum weighted sum of: CPU_PER_SESSION, CONNECT_TIME,
LOGICAL_READS_PER_SESSION, and PRIVATE_SGA. If this limit is exceeded, Oracle aborts the session and returns an error.
PRIVATE_SGA                --Maximum integer bytes of private space in the SGA
(useful for systems using multi-threaded server MTS)

range  =  UNLIMITED | DEFAULT | integer

for PRIVATE_SGA specify K or M
e.g.
ALTER PROFILE MyProfile LIMIT PRIVATE_SGA 50 K

New with Oracle 8 are password related profile limits...

 

 

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