rsdb/max_blocking_factor is a SAP Parameter attribute which is used to control Split factor for FOR ALL ENTRIES queries information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter is only intended for internal use and must not be changed
without explicit instruction from SAP.
An internal table [itab] with entry data is always returned to an ABAP
SELECT query with the addition FOR ALL ENTRIES. The profile parameter
sets the upper limit for the amount of entries from [itab] to be
processed in a statement That is, if the internal table included in the
FOR ALL ENTRIES clause contains more than rsdb/max_blocking_factor
lines, the Open SQL statement is divivded up into multiple statements
with regard to the database whose individual results are collected in
the DB interface and then returned as a total result to the ABAP
program. For an internal table with N lines, with regard to the database
N / "rsdb/max_blocking_factor" + 1
individual SELECT statements are issued. This parameter however does not
have any effect in the construction of IN (...) - see the documentation
The technical maximim blocking factor is calculated for each statement
so that no database system limits are exceeded. If the flocking factor
limit is less than max_blocking_factor then this limit is implicitly
See SAP Parameter Documentation for full SAP documentation for this profile parameter.