| log_archive_format | The initialization parameter that specifies the format of archived log filenames. |
| log_ | Archived log filenames will start with these characters. |
| %s | Places the log sequence number into the name. |
| %t | Places the thread number into the name. |
| The numbers 387-389 | The log sequence number as it will appear in the actual filename. |
| The three "1"s | The thread number as it will appear in the actual filename. |
| %T | The thread number in a fixed-width format. |
| %S | The log sequence number in a fixed-width format. |
| The three 001s | The thread number appears as 001. |
| 00387 - 00389 | The log sequence numbers also appear with leading zeros. |
