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Should I amend the SQL Server
"Backup Buffer Size"? Under most circumstances no, and even then you would need to test in your own environment to see whether it made any difference in your particular disk/tape subsystem. There are too many variables of disk speed, raid controller buffers, tape speed, tape blocksize etc. to say whether increasing this area of memory that SQL uses will make any difference. Example figures are below taken from a large system doing a dump to 3 striped DLT 7000 drives from a very fast disk subsystem with 40 spindles and varying the "backup buffer size" parameter. The figures don't change that much, but in general lower numbers of buffers were better. 1 01:12:00.687 2 01:11:28.860 3 01:11:50.969 4 01:13:18.859 5 01:15:01.750 6 01:17:15.594 7 01:16:41.516 8 01:16:11.469 |
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