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Assume that you use precomputed partitions in merge replication with parameterized and join filters in Microsoft SQL Server 2012 or Microsoft SQL Server 2014. When you try to use the INSERT statement in tables at the root of the filter (on Publisher side), you may experience decreased performance on INSERT.

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INSERT into <Table> triggers Merge INSERT trigger MSmerge_ins_XXXX, and the trigger calls the procedure MSmerge_expand_sp_XXXX.
If you encounter this issue, you will notice that the following Insert/Select Distinct statement of the Merge expansion procedure MSmerge_expand_sp_XXXX consumes much time. In this situation, the performance of INSERT decreases.

insert into dbo.MSmerge_current_partition_mappings with (rowlock) (publication_number, tablenick, rowguid, partition_id)
select distinct 1, mc.tablenick, mc.rowguid, v.partition_id
from dbo.MSmerge_contents mc with (rowlock)
JOIN dbo.[MSmerge_dynamic_filter_merge_new_settings_PARTITION_VIEW] v with (rowlock)
ON mc.tablenick = <tablenick>
and mc.rowguid = v.[rowguid]
and mc.marker = @child_marker
and v.partition_id in (select partition_id from dbo.MSmerge_current_partition_mappings cpm with (rowlock) JOIN
dbo.MSmerge_contents mc2 with (rowlock)
ON cpm.rowguid = mc2.rowguid
and mc2.marker = @marker)
where not exists (select * from MSmerge_current_partition_mappings with (readcommitted, rowlock, readpast) where
publication_number = 1 and
tablenick = <tablenick> and
rowguid = v.[rowguid] and
partition_id = v.partition_id)


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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