RE: DBMS_STATS.GATHER_DICTIONARY_STATS not gathering stale statistics

Hi

Patch applied but still got strange results

SQL> exec dbms_stats.gather_dictionary_stats(degree => 8);

PL/SQL procedure successfully completed.

Elapsed: 00:37:07.89

select to_char(last_analyzed, 'yyyymmdd') , count(*) from dba_tab_statistics where stale_stats = 'YES' and owner = 'SYS' group by to_char(last_analyzed, 'yyyymmdd') order by 1;

TO_CHAR( COUNT(*)
-------- ----------

20210713          1
20210714        346

I should get very few o 0 tables with stale statistics under sys IMHO.

Thanks

On Wed, Jul 14, 2021 at 1:41 AM Ls Cheng <exriscer_at_gmail.com<mailto:exriscer_at_gmail.com>> wrote: Hi

I am not 100% sure if the symptoms match because the last_analyzed for those stale stats tables are from a few days ago to a few months ago. However I am planning to apply the patch for bug 31464691 due to other issues (mentioned in 2448781.1) tomorrow, I will see if it fixes this issue and let you know.

Thanks

On Tue, Jul 13, 2021 at 11:18 PM Fairlie Rego <fairlie.rego_at_gmail.com<mailto:fairlie.rego_at_gmail.com>> wrote: Isn't this the bug documented below

Statistics for All Tables Getting Stale With No Data Change in 12.2 (Doc ID 2448781.1)

• Data has not changed but many objects have stale statistics Ta Fairlie

On Wed, Jul 14, 2021 at 4:08 AM Ls Cheng <exriscer_at_gmail.com<mailto:exriscer_at_gmail.com>> wrote: Hi

I think so

SQL> SELECT DBMS_STATS.get_prefs('PUBLISH') DBMS_STATS_PREFS from dual;

DBMS_STATS_PREFS

On Tue, Jul 13, 2021 at 5:49 PM Powell, Mark <mark.powell2_at_dxc.com<mailto:mark.powell2_at_dxc.com>> wrote: Are your statistics set to publish?

Mark Powell
Database Administration
(313) 592-5148

Hi all

I am running 19.10 8 nodes RAC database with Multitenant. I noticed that after running DBMS_STATS.GATHER_DICTIONARY_STATS in the PDB I still see tables with stale statistics under SYS. For example:

exec DBMS_STATS.GATHER_DICTIONARY_STATS

SQL> select count(*)
  2 from dba_tab_statistics
  3 where STALE_STATS = 'YES'
  4 and owner = 'SYS';

  COUNT(*)

       305

Anyone seen this behaviour?