syslog_disk_size

Description

syslog_disk_size specifies the maximum disk space available for system logs. When the total size of system logs is close to the value specified by this parameter, the earliest log file is deleted, regardless of whether it is compressed.

Limitations

• Query the parameter

  In the sys tenant or a user tenant, you can execute the SHOW PARAMETERS statement to query the parameter or query the GV$OB_PARAMETERS view for the parameter.

• Modify the parameter

  You can modify the parameter only in the sys tenant.

Attributes

Considerations

• This parameter specifies the maximum disk space for all uncompressed and compressed log files in the {install_path}/log directory.

• The relationship between the syslog_disk_size parameter and the max_syslog_file_count parameter is as follows:

  1. max_syslog_file_count=0 and syslog_disk_size=0: Log files are not deleted until the disk is full.
  2. max_syslog_file_count=0 and syslog_disk_size>0: When the total size of log files is close to the value specified by syslog_disk_size, the earliest log file is deleted to recycle disk space.
  3. max_syslog_file_count>0 and syslog_disk_size=0: When the number of specific log files exceeds the value specified by max_syslog_file_count, the earliest log file is deleted to recycle disk space.
  4. max_syslog_file_count>0 and syslog_disk_size>0: When the number of specific log files exceeds the value specified by max_syslog_file_count or the total size of log files is close to the value specified by syslog_disk_size, the earliest compressed log file is deleted.

Examples

Set the maximum disk space for system logs to 50 GB.

obclient> ALTER SYSTEM SET syslog_disk_size='50GB';

References

• Logs
• Log control