>>>>>>>>>>> result on LASNDK >>>>>>>>>

>>>>>>>>>>> result on LASZONA >>>>>>>>>

>>>>>>>>>>> result on LASNDK >>>>>>>>>

>>>>>>>>>>> result on LASZONA >>>>>>>>>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

"see more" <seemore@discussions.microsoft.com> wrote in message
news:06B0794F-552C-47CC-9208-84902E718BE5@microsoft.com...
> We are standing at 3 level merge replication, SQL2000 SP3.
> One topmost server, couple of mid-server republishers with 1-4 subscribers
> (3-rd level) each. The replication strategy is working smooth for about 4
> years, but the strange behaviour we noticed starting month ago.
>
> One of republishers, named LASNDK begun generatind abnormal amount of
> generation history records (msmerge_genhistory rows). His subscriber WSNDK
> spends now 4:30 minutes avg. for one synchronization. Synchronization time
> for other subscribers (with nearly the same data load) is about 20-30 sec
> and
> this was the timing 2 onths ago with WSNAD too. Trying to resolve the
> problem, looking for orphaned generations, local generations and so on, we
> found some interesting (but unexpected) behaviour.
>
> First of all, there are 1,199,427 rows in msmerge_genhistory table.
> Rublication on republisher LASNDK has 30day retention period and this
> matches
> all rows in msmerge_genhistory table. These 1,199,427 rows are all from
> last
> 30day period. Comparison between 2 republishers LASNDK and LASZONA
> follows:
> --------------------------------------
>
> SET NOCOUNT ON
>
> SELECT CAST( SERVERPROPERTY( 'servername' ) AS VARCHAR(20) ) republisher
>
> SELECT COUNT(*) gh
> FROM msmerge_genhistory
>
> SELECT COUNT(*) c
> FROM msmerge_contents
>
> SELECT COUNT(*) ts
> FROM msmerge_tombstone
>
>>>>>>>>>>>> result on LASNDK >>>>>>>>>
>
> republisher
> --------------------
> LASNDK
>
> gh
> -----------
> 1199415
>
> c
> -----------
> 41287
>
> ts
> -----------
> 8141
>
>>>>>>>>>>>> result on LASZONA >>>>>>>>>
>
> republisher
> --------------------
> LASZONA
>
> gh
> -----------
> 101784
>
> c
> -----------
> 43721
>
> ts
> -----------
> 9834
>
> --------------------------------------
>
> Second, we look at generation count distribution by days in two servers
>
> --------------------------------------
>
> SET NOCOUNT ON
>
> SELECT CAST( SERVERPROPERTY( 'servername' ) AS VARCHAR(20) ) republisher
>
> SELECT DATEPART( dayofyear, coldate ) day,
> COUNT(*) gencount
> FROM msmerge_genhistory
> GROUP BY
> DATEPART( dayofyear, coldate )
> ORDER BY
> DATEPART( dayofyear, coldate )
>
>>>>>>>>>>>> result on LASNDK >>>>>>>>>
>
> republisher
> --------------------
> LASNDK
>
> day gencount
> ----------- -----------
> 111 1501
> 112 4052
> 113 10234
> 114 3056
> 115 3473
> 116 3752
> 117 3423
> 118 4196
> 119 4118
> 120 2817
> 121 2514
> 122 849
> 123 5074
> 124 3660
> 125 3707
> 126 2863
> 127 2682
> 128 2809
> 129 78963
> 130 119707
> 131 179610
> 132 178117
> 133 179382
> 134 171136
> 135 160108
> 136 50829
> 137 3334
> 138 3341
> 139 3591
> 140 3282
> 141 2839
> 142 404
>
>>>>>>>>>>>> result on LASZONA >>>>>>>>>
>
> republisher
> --------------------
> LASZONA
>
> day gencount
> ----------- -----------
> 111 1869
> 112 4941
> 113 4030
> 114 3014
> 115 3485
> 116 3702
> 117 3631
> 118 4014
> 119 4108
> 120 2818
> 121 2523
> 122 1765
> 123 4155
> 124 3670
> 125 3706
> 126 2857
> 127 2677
> 128 2807
> 129 3700
> 130 3440
> 131 3310
> 132 3171
> 133 3014
> 134 2840
> 135 2536
> 136 3196
> 137 3362
> 138 3294
> 139 3592
> 140 3285
> 141 2852
> 142 402
>
> ----------------------------------------
>
> And next we look at day 134 and day 137 in LASNDK. Day 134 has 171,136
> generations, day 137 has 3334 (near to avg generations per day for LASZONA
> and LASNDK except some peaks). This is 20-times difference. Looking deeper
> on
> these two days give us:
>
> ----------------------------------------
>
> SET NOCOUNT OFF
>
> SELECT CAST( SERVERPROPERTY( 'servername' ) AS VARCHAR(20) ) republisher
>
> SELECT coldate,
> count(*) gencount_137
> FROM msmerge_genhistory
> WHERE coldate >= '2005-05-17'
> AND coldate < '2005-05-18'
> GROUP BY
> coldate
> ORDER BY
> coldate
>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>
> republisher
> --------------------
> LASNDK
>
> (1 row(s) affected)
>
> coldate gencount_137
> ------------------------------------------------------ ------------
> 2005-05-17 00:00:21.810 1
> 2005-05-17 00:00:22.123 1
> 2005-05-17 00:00:22.153 1
> 2005-05-17 00:00:22.170 1
> 2005-05-17 00:00:22.187 1
> 2005-05-17 00:00:22.217 1
> 2005-05-17 00:00:22.233 1
> 2005-05-17 00:00:22.250 1
> 2005-05-17 00:00:22.263 2
> 2005-05-17 00:00:22.280 1
>
> ... Skipping the middle, all rows with gencount=1 or gencount=2
>
> 2005-05-17 23:56:08.200 1
> 2005-05-17 23:56:08.217 1
> 2005-05-17 23:56:08.250 1
>
> (2929 row(s) affected)
>
> -----------------------------------------
>
> and look now at most interesting part (day 134)
>
> -----------------------------------------
>
> SET NOCOUNT OFF
>
> SELECT CAST( SERVERPROPERTY( 'servername' ) AS VARCHAR(20) ) republisher
>
> SELECT coldate,
> count(*) gencount_134
> FROM msmerge_genhistory
> WHERE coldate >= '2005-05-14'
> AND coldate < '2005-05-15'
> GROUP BY
> coldate
> ORDER BY
> coldate
>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>
> republisher
> --------------------
> LASNDK
>
> (1 row(s) affected)
>
> coldate gencount_134
> ------------------------------------------------------ ------------
> 2005-05-14 00:05:06.847 1366
> 2005-05-14 00:21:05.783 1
> 2005-05-14 00:21:06.033 1
> 2005-05-14 00:21:06.063 2