Valid for
Manager
Description
Use PURGEOLDEXTRACTS
in a Manager parameter file to purge trail files when Oracle GoldenGate has finished processing them. By using PURGEOLDEXTRACTS
as a Manager parameter, you can use options that are not available with the Extract or Replicat version. Allowing Manager to control the purging helps to ensure that no file is purged until all groups are finished with it.
To purge trail files, you can use the following rules:
Purge if all processes are finished with a file as indicated by checkpoints. Use the USECHECKPOINTS
option. (This is the default.)
MINKEEP
rules set the time or number of files to keep. Specify only one of the following three parameters.
Keep files or rows for at least a specified number of hours or days. Use the MINKEEPHOURS
and MINKEEPDAYS
options.
Keep at least n files including the active file. Use the MINKEEPFILES
option.
The Manager process determines which files to purge based on Extract and Replicat processes configured on the local system. If at least one process reads a trail file, Manager applies the specified rules; otherwise, the rules do not take effect.
Refer to the information on managing trails in the Recommendations for Managing Trail Purgesfor recommendations on using the rules.
Default
None (do not purge)
Syntax
PURGEOLDEXTRACTS trail_name
[, USECHECKPOINTS | NOUSECHECKPOINTS]
[, min_rule]
trail_name
The trail to purge. Use the fully qualified name.
USECHECKPOINTS
Purges after all Extract or Replicat processes are finished with the file as indicated by checkpoints.
NOUSECHECKPOINTS
Allows purging without considering checkpoints, based on keeping a minimum of one file (if no MINKEEP
rule is used) or the number of files specified with a MINKEEP
rule.
min_rule
Use only one of the following to set rules for the minimum amount of time to keep data.
Examples
The following example purges all files in the \NY.$DATA3.GGSDAT
subvolume after checkpoints indicate that they no longer are needed, but it keeps the files at least 3 days.
PURGEOLDEXTRACTS \NY.$DATA3.GGSDAT.*, USECHECKPOINTS, MINKEEPDAYS 3
Trail files AA000000
, AA000001
, and AA000002
exist. Replicat has been down for four hours and has not completed processing.
The Manager parameters include:
PURGEOLDEXTRACTS /ggs/dirdat/AA*, NOUSECHECKPOINTS, MINKEEPHOURS 2
Result: All trail files will be purged because the minimums have been met.