What is better to have little and big primary logs or small and less primary logs?
Up to DB2What is better to have little and big primary logs or small and less primary logs?
Posted by Pawan at April 18. 2008Hi,
when settings primary vs. secondary logs there is general rule to use primary logs, according to database snapshot info. But what is recommendation to use primary logs? Should I use multiple small primary logs or small amount of big primary logs.
Variant 1:
LOGFILSIZ = 10000
LOGPRIMARY = 4
disk primary log capacity = LOGFILSIZ * LOGPRIMARY = 40000 pages
or
Variant 2:
LOGFILSIZ = 2000
LOGPRIMARY = 20
disk primary log capacity = LOGFILSIZ * LOGPRIMARY = 40000 pages
When should I choose variant 1 (so small amount of big logs) and when variant 2 (multiple small files).
Thanks
Pawan
Re: What is better to have little and big primary logs or small and less primary logs?
Posted by perallis at April 18. 2008Variant 1:LOGFILSIZ = 10000
LOGPRIMARY = 4
disk primary log capacity = LOGFILSIZ * LOGPRIMARY = 40000 pages
In the Variant 1 you will have more perform
Variant 2:
LOGFILSIZ = 2000
LOGPRIMARY = 20
disk primary log capacity = LOGFILSIZ * LOGPRIMARY = 40000 pages
In the Variant 2 the time spent to archive logs will be less and in the case of crash recovery the recovery operation will be faster.