Sql-server – Need best way to to avoid Replication Re-Configuration

Below script will help you find out how many undistributed commands are there. Also, do you see any errors in sql server or windows logs ? Is it just slow or any failures reported ?

SELECT ( CASE 
           WHEN mdh.runstatus = '1' THEN 'Start - ' + CAST( 
                                         mdh.runstatus AS VARCHAR) 
           WHEN mdh.runstatus = '2' THEN 'Succeed - ' + CAST( 
                                         mdh.runstatus AS VARCHAR) 
           WHEN mdh.runstatus = '3' THEN 'InProgress - ' + CAST( 
                                         mdh.runstatus AS VARCHAR) 
           WHEN mdh.runstatus = '4' THEN 'Idle - ' + CAST(mdh.runstatus AS 
                                                          VARCHAR) 
           WHEN mdh.runstatus = '5' THEN 'Retry - ' + CAST( 
                                         mdh.runstatus AS VARCHAR) 
           WHEN mdh.runstatus = '6' THEN 'Fail - ' + CAST(mdh.runstatus AS 
                                                          VARCHAR) 
           ELSE CAST(mdh.runstatus AS VARCHAR) 
         END )                                   [Run Status], 
       mda.subscriber_db                         [Subscriber DB], 
       mda.publication                           [PUB Name], 
       RIGHT(LEFT(mda.name, Len(mda.name) - ( Len(mda.id) + 1 )), 
       Len(LEFT(mda.name, Len(mda.name) - ( Len(mda.id) + 1 ))) - ( 
       10 + Len(mda.publisher_db) + ( CASE 
                                          WHEN mda.publisher_db = 'ALL' THEN 1 
                                          ELSE Len(mda.publication) + 2 
                                        END ) )) [SUBSCRIBER], 
       CONVERT(VARCHAR(25), mdh.[time])          [LastSynchronized], 
       und.undelivcmdsindistdb                   [UndistCom], 
       mdh.comments                              [Comments], 
       'select * from distribution.dbo.msrepl_errors (nolock) where id = ' + 
       CAST(mdh.error_id AS VARCHAR(8))          [Query More Info], 
       mdh.xact_seqno                            [SEQ_NO], 
       ( CASE 
           WHEN mda.subscription_type = '0' THEN 'Push' 
           WHEN mda.subscription_type = '1' THEN 'Pull' 
           WHEN mda.subscription_type = '2' THEN 'Anonymous' 
           ELSE CAST(mda.subscription_type AS VARCHAR) 
         END )                                   [SUB Type], 
       mda.publisher_db + ' - ' + CAST(mda.publisher_database_id AS VARCHAR) 
                                                 [Publisher DB], 
       mda.name 
       [Pub - DB - Publication - SUB - AgentID] 
FROM   distribution.dbo.msdistribution_agents mda 
       LEFT JOIN distribution.dbo.msdistribution_history mdh 
         ON mdh.agent_id = mda.id 
       JOIN (SELECT s.agent_id, 
                    maxagentvalue.[time], 
                    SUM(CASE 
                          WHEN xact_seqno > maxagentvalue.maxseq THEN 1 
                          ELSE 0 
                        END) AS undelivcmdsindistdb 
             FROM   distribution.dbo.msrepl_commands t (nolock) 
                    JOIN distribution.dbo.mssubscriptions AS s (nolock) 
                      ON ( t.article_id = s.article_id 
                           AND t.publisher_database_id = s.publisher_database_id 
                         ) 
                    JOIN (SELECT hist.agent_id, 
                                 MAX(hist.[time]) AS [time], 
                                 h.maxseq 
                          FROM   distribution.dbo.msdistribution_history hist ( 
                                 nolock) 
                                 JOIN (SELECT agent_id, 
                                              Isnull(MAX(xact_seqno), 0x0) AS 
                                              maxseq 
                                       FROM 
                                 distribution.dbo.msdistribution_history ( 
                                 nolock) 
                                       GROUP  BY agent_id) AS h 
                                   ON ( hist.agent_id = h.agent_id 
                                        AND h.maxseq = hist.xact_seqno ) 
                          GROUP  BY hist.agent_id, 
                                    h.maxseq) AS maxagentvalue 
                      ON maxagentvalue.agent_id = s.agent_id 
             GROUP  BY s.agent_id, 
                       maxagentvalue.[time]) und 
         ON mda.id = und.agent_id 
            AND und.[time] = mdh.[time] 

Assuming your Publisher is using an int identity that begins at 1, you could issue DBCC CHECKIDENT('dbo.mytable', RESEED, -2147483648) at the subscriber. You can then use the range from -2147483648 to 0 to hold your "temporary deltas".