I am running script which drop all public synonyms and create private synonyms for all eligible objects. I am passing value to procedure through cursor and I am using dbms_output.
ERROR at line 1:
ORA-20000: ORU-10027: buffer overflow, limit of 999999 bytes
ORA-06512: at "SYS.DBMS_OUTPUT", line 32
ORA-06512: at "SYS.DBMS_OUTPUT", line 97
ORA-06512: at "SYS.DBMS_OUTPUT", line 112
ORA-06512: at line 101
I read that by: SET SERVEROUTPUT ON SIZE unlimited would resolve this problem.
What are the effects?Do I need to check any disk space, or any effect on the memory?
when i am executing the procedure, i am getting the below error.
I have added below lines in the procedure.
DBMS_OUTPUT.ENABLE(100000);
Even though i am getting the error.
ORA-20000: ORU-10027: buffer overflow, limit of 100000 bytes ORA-06512: at "SYS.DBMS_OUTPUT", line 32 ORA-06512: at "SYS.DBMS_OUTPUT", line 97 ORA-06512: at "SYS.DBMS_OUTPUT", line 112 ORA-06512: at "Procedure name", line 199 ORA-06512: at line 1 20000. 00000 - "%s"
*Cause: The stored procedure 'raise_application_error' was called which causes this error to be generated.
*Action: Correct the problem as described in the error message or contact the application administrator or DBA for more information.
Does cache buffer chain latch and buffer busy wait event are related to one any another.
Latch definition from Google says : Latches are simple, low-level serialization mechanisms to protect shared data structures in the system global area (SGA).
what does it mean my protect. Does this mean protects from aging as per LRU algorithm and getting removed from SGA or protect from other processes ,say from example from simultaneously DML operations. or both
Does buffer busy wait event occurs , because of the cache buffer chain latch ?
I've just installed an Oracle 11.2.0.1.0 64 bit server on my windows 7 machine in order to play around while using attempting to run
exec dbms_stats.gather_table_stats('eii','v2x4e')
I get the following: ORA-20000: Unable to analyze TABLE "EII"."V2X4E", insufficient privileges or does not exist ORA-06512: at "SYS.DBMS_STATS", line 20327 ORA-06512: at "SYS.DBMS_STATS", line 20360 ORA-06512: at line 1
My initial google searches indicate that I need the select any table and analyze any privileges. I don't think that can be right/appropriate - but I've granted them anyway to no avail.
Select * from user_tables
returns tables in the System and sysaux tablespaces, but not my own schema/tablespace?
I am writing a query and the query is resulting in Numeric Overflow.
SELECT
(power((Trlg_5Yr_Anl_Ror_Pt/100+1),5)-1)*100 AS Trlg_5Yr_Cum_Ror_Pt
FROM Cdp where .... and .....
In this above query,the power function is throwing error. Since the value in the column "Trlg_5Yr_Anl_Ror_Pt" is very big,applying power function is throwing Numeric Error. What can I do to handle this?
IN TABLE Cdp,column "Trlg_5Yr_Anl_Ror_Pt" is defined as NUMBER. Will Changin it to FLOAT resolve the issue.
SQL> ed Wrote file afiedt.buf 1 begin 2 for i in 3159572060..3159572274 loop 3 insert into recmsisdn(msisdn) 4 values(i); 5 end loop; 6* end; 7 / begin * ERROR at line 1: ORA-01426: numeric overflow ORA-06512: at line 2
I have a few questions and doubts regarding to cache buffer chains and lru chains.
1. What can possibly cause the cache buffers chain ? 2. Can it be resolved by increasing the free lists and increasing the inittrans of the block after identifying the hot buffers? (The table spaces are not a ASSM.) 3. How can we classify where the cache buffer chain is caused? Is there anything like extent level, header level? ( i don't understand this part due to the reason i see many operations against cache buffer chain event in stats pack reports). 4. Is cache buffer chain is related to the cache buffers chain event too? 5. In such case, tuning either of the contention will resolve the other if both exists?
I'm trying to create a table with a select statement. I want to populate this new table with the aggregated value from a VIEW. Following is the code used for creating the VIEW,
create or replace view FINAL_WEB_LOG as select SESSION_ID, SESSION_DT, C_IP, CS_USER_AGENT, tab_to_string(CAST(COLLECT(web_link) AS t_varchar2_tab)) WEBLINKS from web_views_tab group by C_IP, CS_USER_AGENT, SESSION_DT;
I want to create a table with WEBLINKS and SESSION_ID which is a sequence from another table.
CREATE TABLE FINAL_WEB AS SELECT weblinks FROM final_web_log UNION SELECT session_id FROM WEB_VIEWS_TAB;
This now gives me the following error,
SQL Error: ORA-06502: PL/SQL: numeric or value error: character string buffer too small
This has to do with the field, Weblinks, it does have longer values.
What's the difference between a dirty buffer and a redo buffer?
My understanding is that a dirty buffer is a changed buffer or whenever data changes in the buffer cache, it's marked as dirty. Also, a redo buffer keeps track of changes that were made to the data, so it's also referring to changed data as well...DWBn writes dirty buffers to disk and LGWR writes redo data to redo log filesHow can we differentiate between the two?
I learnt that logWriter writes in the redo log files when redo log buffer is 1/3 full, it means that 66 % of redo log buffer are always empty and never used,
if no, isn't a waste of memory (66 % always empty !)
Considering the below factors, I am planning to increase the buffer cache value from 256Mb to 512Mb.
1. Buffer cache hit ratio value is around 35% even in the normal period. 2. free buffer requested value is below during peak & normal hours below.
Statistic Total per Second per Trans --------------------------------- ------------------ -------------- ------------ free buffer requested 54,694,995 15,226.9 2,523.7 free buffer requested 23,412,674 6,501.7 2,585.9
3. most of the top 5 physical reads & logical reads queries are well tuned and some of queries are doing FTS on small tables (table count min 1500 max 35000). SO indexing option is not required for these queires. But these queries getting executed frequently.
SQL> show sga
Total System Global Area 2148534928 bytes Fixed Size 731792 bytes Variable Size 1879048192 bytes Database Buffers 268435456 bytes Redo Buffers 319488 bytes
5.top 5 waitevents during db slow performance & high cpu utilization (>80%) issue.
Top 5 Timed Events ~~~~~~~~~~~~~~~~~~ % Total Event Waits Time (s) Ela Time -------------------------------------------- ------------ ----------- -------- latch free 1,848,898 153,793 52.00 buffer busy waits 395,280 87,201 29.49 db file scattered read 3,488,648 34,199 11.56 enqueue 4,052 10,897 3.68 CPU time 5,567 1.88
6. Top 5 waitvents during normal activities and CPU utilization is around 40%.
Top 5 Timed Events ~~~~~~~~~~~~~~~~~~ % Total Event Waits Time (s) Ela Time -------------------------------------------- ------------ ----------- -------- CPU time 1,860 45.32 db file scattered read 1,133,669 985 23.99 imm op 776 605 14.73 sbtinfo2 208 139 3.40 sbtbackup 2 123 3.00
1) Is shutting down the DB flush all the data buffers, from the buffer Cache? 2) In any oracle version, do we have any way to flush only the buffer Cache.
I noticed oracle background process ora_fbda_padwsdpr is suffering from buffer busy wait. When i further finding the object, it was on SYS_FBA_FA tables.
what is this is causing BUFFER BUSY WAIT. Also to add we have disabled flashback database.
1)If i issue a DELETE statement to delete a row, will this statement drag any data from the datafile to database buffer? How is the change made by a DELETE statement recorded in buffer cache? How is this change then applied to the data in datafiles after commit?
I have some confusion about Keep Pool in Buffer Cache.
1. What is the reasoning for placing a table in the KEEP buffer pool because if it is frequently accessed, it will be around when needed (ie if it is constantly being accessed it will not age out) . 2. Would the table be still in the Default Pool if the Keep Pool is not sized and the command is being issued alter TABLE SCOTT.EMP storage (buffer_pool keep) ? 3. If the database is restarted will the table be wiped out of the Keep Pool and again be pinned to the Keep Pool ?
