Time Series Format of Operating System Statistics - "Please Ignore"

Question

Hi List,
On the AWR report we see the "Operating System Statistics" section.. since generating multiple AWR reports is daunting and takes a lot of time and I'm only interested on particular columns of dba_hist_osstat (where that particular section of AWR pulls the data)... I'd like to have an output like this:
SNAP_ID BUSY_TIME LOAD NUM_CPUS PHYSICAL_MEMORY_BYTES
244 6792 .23 1 169520
245 1603 .04 1 154464
246 28415 .05 1 5148
Problem is, the dba_hist_osstat values are stored as rows...
select * from dba_hist_osstat where snap_id = 244;
244     2607950532     1     0     NUM_CPUS     1
244     2607950532     1     1     IDLE_TIME     57153
244     2607950532     1     2     BUSY_TIME     5339
244     2607950532     1     3     USER_TIME     1189
244     2607950532     1     4     SYS_TIME     4077
244     2607950532     1     5     IOWAIT_TIME     2432
244     2607950532     1     6     NICE_TIME     0
244     2607950532     1     14     RSRC_MGR_CPU_WAIT_TIME     0
244     2607950532     1     15     LOAD     0.099609375
244     2607950532     1     1008     PHYSICAL_MEMORY_BYTES     300536
So I got this query to walk through all the SNAP_IDs with the following output. I'd just like to format particular columns like the one I mentioned (above) for the data to be more meaningful and to be easily loaded on excel for visualization. Well I can also do this on "Instance Activity Stats" (dba_hist_sysstat) and other stuff..
select
b.snap_id, substr(e.stat_name, 1, 35) as name,
(case when e.stat_name like 'NUM_CPU%' then e.value
when e.stat_name = 'LOAD' then e.value
when e.stat_name = 'PHYSICAL_MEMORY_BYTES' then e.value
else e.value - b.value
end) as value
from dba_hist_osstat b,
dba_hist_osstat e
where
b.stat_name = 'BUSY_TIME' and
b.dbid = 2607950532
and e.dbid = 2607950532
and b.instance_number = 1
and e.instance_number = 1
and e.snap_id = b.snap_id + 1
and b.stat_id = e.stat_id
order by snap_id, name asc
SNAP_ID NAME VALUE
244     BUSY_TIME     6792
245     BUSY_TIME     1603
246     BUSY_TIME     28415
BTW, try to generate AWR reports on a particular SNAP_IDs, the value you get from the query will be the same on the report...
- Karl Arao
karlarao.wordpress.com
Edited by: Karl Arao on Jan 31, 2010 12:07 PM

Answer 1

I got the final version of the script...
SELECT s0.snap_id,
TO_CHAR(s0.END_INTERVAL_TIME,'YYYY-Mon-DD HH24:MI:SS') snap_start,
TO_CHAR(s1.END_INTERVAL_TIME,'YYYY-Mon-DD HH24:MI:SS') snap_end,
round(EXTRACT(DAY FROM s1.END_INTERVAL_TIME - s0.END_INTERVAL_TIME) * 1440 + EXTRACT(HOUR FROM s1.END_INTERVAL_TIME - s0.END_INTERVAL_TIME) * 60 + EXTRACT(MINUTE FROM s1.END_INTERVAL_TIME - s0.END_INTERVAL_TIME) + EXTRACT(SECOND FROM s1.END_INTERVAL_TIME - s0.END_INTERVAL_TIME) / 60, 2) ela_min,
s1t1.value - s1t0.value AS busy_time,
s2t1.value AS load,
s3t1.value AS num_cpus,
s4t1.value AS physical_memory_bytes
FROM dba_hist_snapshot s0,
dba_hist_snapshot s1,
dba_hist_osstat s1t0,
dba_hist_osstat s1t1,
dba_hist_osstat s2t1,
dba_hist_osstat s3t1,
dba_hist_osstat s4t1
WHERE s0.dbid = 2607950532
AND s1t0.dbid = s0.dbid
AND s1t1.dbid = s0.dbid
AND s2t1.dbid = s0.dbid
AND s3t1.dbid = s0.dbid
AND s4t1.dbid = s0.dbid
AND s0.instance_number = 1
AND s1t0.instance_number = s0.instance_number
AND s1t1.instance_number = s0.instance_number
AND s2t1.instance_number = s0.instance_number
AND s3t1.instance_number = s0.instance_number
AND s4t1.instance_number = s0.instance_number
AND s1.snap_id = s0.snap_id + 1
AND s1t0.snap_id = s0.snap_id
AND s1t1.snap_id = s0.snap_id + 1
AND s2t1.snap_id = s0.snap_id + 1
AND s3t1.snap_id = s0.snap_id + 1
AND s4t1.snap_id = s0.snap_id + 1
AND s1t0.stat_name = 'BUSY_TIME'
AND s1t1.stat_name = s1t0.stat_name
AND s2t1.stat_name = 'LOAD'
AND s3t1.stat_name = 'NUM_CPUS'
AND s4t1.stat_name = 'PHYSICAL_MEMORY_BYTES'
ORDER BY snap_id ASC
SNAP_ID SNAP_START          SNAP_END          ELA_MIN BUSY_TIME     LOAD     NUM_CPUS PHYSICAL_MEMORY_BYTES
244 2010-Jan-14 12:38:36 2010-Jan-14 13:03:23     24.78 6792 .239257813     1          169520
245 2010-Jan-14 13:03:23 2010-Jan-14 13:10:38     7.25 1603 .049804688     1          154464
246 2010-Jan-14 13:10:38 2010-Jan-14 14:00:39     50.02 28415 .059570313     1          5148
247 2010-Jan-14 14:00:39 2010-Jan-14 15:00:42     60.04 8993     0     1          29292
248 2010-Jan-14 15:00:42 2010-Jan-15 23:56:37     1975.92 -46770 .049804688     1          311216
249 2010-Jan-15 23:56:37 2010-Jan-16 01:00:40     64.05 17722 .659179688     1          109880
250 2010-Jan-16 01:00:40 2010-Jan-16 02:00:42     60.03 7089 .229492188     1          43576
251 2010-Jan-16 02:00:42 2010-Jan-16 10:05:01     484.31 -23928     0     1          310720
252 2010-Jan-16 10:05:01 2010-Jan-16 11:01:02     56.03 8906 .099609375     1          186432
From the AWR...
Snap Id Snap Time Sessions Curs/Sess
Begin Snap: 244 14-Jan-10 12:38:36 25 1.8 <-- same from above output (start & end)
End Snap: 245 14-Jan-10 13:03:23 24 2.0
Elapsed: 24.78 (mins) <-- same from above output (4th col)
DB Time: 0.32 (mins)
... output snipped ...
Operating System Statistics DB/Inst: IVRS/ivrs Snaps: 244-245
Statistic Total
BUSY_TIME 6,792 <-- same from above output (5th col)
IDLE_TIME 141,649
IOWAIT_TIME 4,468
NICE_TIME 0
SYS_TIME 4,506
USER_TIME 2,115
LOAD 0
RSRC_MGR_CPU_WAIT_TIME 0
PHYSICAL_MEMORY_BYTES 169,520 <-- same from above output (last col)
NUM_CPUS 1
And comming from the original query.. all output is similar above..
select
b.snap_id, substr(e.stat_name, 1, 35) as name,
(case when e.stat_name like 'NUM_CPU%' then e.value
when e.stat_name = 'LOAD' then e.value
when e.stat_name = 'PHYSICAL_MEMORY_BYTES' then e.value
else e.value - b.value
end) as value
from dba_hist_osstat b,
dba_hist_osstat e
where
b.stat_name = 'LOAD' and
b.dbid = 2607950532
and e.dbid = 2607950532
and b.instance_number = 1
and e.instance_number = 1
and e.snap_id = b.snap_id + 1
and b.stat_id = e.stat_id
order by snap_id, name asc
SNAP_ID NAME                     VALUE
244 LOAD                .239257813
245 LOAD                .049804688
246 LOAD                .059570313
247 LOAD                          0
248 LOAD                .049804688
249 LOAD                .659179688
250 LOAD                .229492188
251 LOAD                          0
252 LOAD                .099609375
Hope this helps...
- Karl Arao
karlarao.wordpress.com