the public newspaper stamps
Hi allIs it true that 10 g, we have at least two buffers of the public newspaper, if we have more than one CPU?
Is there some way (see), we could use, to check the actual number of stamps from the public journal (without using the redo log dump)?
Best regards
D.
Since the account is SYS:
select
indx,
FIRST_BUF_KCRFA ,
TOTAL_BUFS_KCRFA ,
STRAND_SIZE_KCRFA
from
x$kcrfstrand
/
INDX FIRST_BUF_KCRFA TOTAL_BUFS_KCRFA STRAND_SIZE_KCRFA
---------- ---------------- ---------------- -----------------
0 070000001B8ED000 46979 24053248
1 070000001CFDD600 46979 24053248
2 070000001E6CDC00 46979 24053248
3 07000017787BC000 249 132096
4 07000017F84B7000 249 132096
5 0700001768685000 249 132096
6 070000175830B000 249 132096
7 0700001748BE8000 249 132096
You can see the address of first is different from the rest - this shows you the public strands are located separately from the private strands.
You can also see the public strands in this system are about 24 MB each, while the private strands are 128KB. (There are many more private elements, incidentally).
Another detail, though - there are features that disable private redo thread, what RAC is the most obvious example.
Concerning
Jonathan Lewis
http://jonathanlewis.WordPress.com
Author: core Oracle
Tags: Database
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