On the Create Journal (CRTJRN) and Change Journal (CHGJRN) commands, you can specify to allow for the deposit of minimized journal entries. This will decrease the size of your journal entries.
When you specify the Minimized Entry Specific Data (MINENTDTA) parameter for an object type, the entry-specific data for the entries of those object types can be minimized. You can minimize journal entries for database physical files and data areas.
The system only minimizes entries if the minimized entry is smaller in size than a complete journal entry deposit. Therefore, even if you specify this option, not all entries that are deposited will be minimized. The Display Journal (DSPJRN) command, Receiver Journal Entry (RCVJRNE) command, Retrieve Journal Entry (RTVJRNE) command, and QjoRetrieveJournalEntries API return data that indicates whether the entry is actually minimized.
The *FILE, *DTAARA, and *FLDBDY values are allowed
on the MINENTDTA parameter for the CRTJRN and CHGJRN commands and indicate
the following: 
- *FILE
- Journaled files may have journal entries deposited with minimized entry specific data. The minimizing will not occur on field boundaries, and the entry specific data may not be viewable and may not be used for auditing purposes. This value cannot be specified if *FLDBDY is specified.
- *FLDBDY
- Journaled files may have journal entries deposited with minimized entry
specific data. The minimizing will occur on field boundaries, and the entry
specific data will be viewable and may be used for auditing purposes.
- The DSPJRN command always displays the entries which have been minimized on field boundaries with formatting.
- The *FILE value is not available in releases prior to V5R4.
- *DTAARA
- Journaled data areas may have journal entries deposited with
minimized entry specific data.
You cannot save or restore a journal receiver with minimized
journal entries to any release prior to V5R1M0, nor can they be replicated
to any remote journal on a system at a release prior to V5R1M0.An optional parameter, Format minimized data (FMTMINDTA), is
available on the Retrieve Journal Entries (RTVJRNE) command, the Receive Journal
Entries (RCVJRNE) command, and the Retrieve Journal Entries (QjoRetrieveJournalEntries)
API. This parameter allows you to specify whether entry specific data which
has been minimized on field boundaries will be returned in a readable format,
which allows you to determine what changes have been made. The possible values
for the FMTMINDTA parameter are *NO or *YES, with the default being *NO. By
default, the methods used by these commands provide the data in their raw
format. The RTVJRNE command will indicate whether or not *FLDBDY has been
specified for Minimized entry specific data with a value of ‘2’ in the already
existing “MINIMIZED ENTRY DATA” field for the appropriate entry formats. *FILE
and *DTAARA will appear as '1' in their fields.
Using the Display Journal (DSPJRN) command, entries are viewable
to the screen, an outfile, or printed output. The DSPJRN command will also
indicate whether or not the *FLDBDY value has been specified for Minimized
entry specific data on the “Display Journal Entry” panel and will indicate
a value of ‘2’ in the “Minimized entry specific data” field of the *OUTFILE
and in the “Min” field of the printed output. *FILE and *DTAARA will appear
as '1' in their fields.
See the Journal code finder link below to see which entries are eligible for minimization. See the Considerations for entries which contain minimized entry-specific data link for more information and considerations when using these entries.
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