Patent ID: 7849060

Claim:
A log information management system comprising: an index/record/catalog management circuit which determines whether a page to be updated is a newly allocated page; a storage management circuit which manages a free page list and a non-committed free page list, allocates a new page from the free page list if the index/record/catalog management circuit determines that the page to be updated is newly allocated, and allocates a new page from the non-committed free page list if the free page list is empty; and a buffer management circuit which prevents log information from being created for the newly allocated page during a transaction by setting a page log sequence number included in identification information on a buffer page corresponding to the newly allocated page to a maximum log sequence number, wherein, if a page log sequence number of a page in a buffer managed by the buffer management circuit corresponds to a maximum value, the storage management circuit changes the page log sequence number to a specified log sequence number before recording the page on a disk, wherein log information is created upon completion of a transaction if the page log sequence number included in the identification information is not set to a maximum log sequence number.