[buffers]
reread_write=0
This value is only used in Windows at present. If it is 0 then if the database manager needs to read data from a buffer that is currently being asynchronously written by the operating system the database manager waits for the write to complete before reading the data. If it is 1 then the database manager does not wait. Therefore performance is slightly improved by setting this value to 1.
The value is 0 by default in releases 4.620 and 4.621 because Microsoft documentation consulted at the time they were produced implied that not waiting for the write to complete could cause data corruption. Microsoft documentation has now changed, and implies that not waiting is safe. The value is 1 by default in 4.622.