511

Product Name

Event ID

511

Event Source

MSSQLSERVER

Component

SQLEngine

Symbolic Name

ROW_TOOBIG

Message Text

Cannot create a row of size %d which is greater than the allowable maximum of %d.

The operation you have tried has exceeded the maximum size of a row. Usually, the maximum

size of a row is 8,060 bytes. Some storage formats contain overhead that can reduce the row

size that is available for data. For example, when you use sparse columns, the maximum size of

a row is 8,018 bytes. Some operations that add or remove rows and some operations that

change the data type of a column require the row to be rewritten on the data page, and then

the original row is removed. In these operations, the effective limit to the size of the row is half

the maximum limit. This is because the original row and the modified row must both be

contained on the data page for a short period.

If it is possible, reduce the size of the row.

If you think the problem is caused by an in-place update of the row, you must change the table

in multiple steps. Create a new table, and transfer the data into the new table. Then, either

delete the original table and rename the new table, or truncate the original table, modify the

rows in the original table, and then move the data back into it.

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