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oracle – ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Stack Overflow
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- Summary of article content: Articles about oracle – ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Stack Overflow This happens when a session other than the one used to alter a table is holding a lock likely because of a DML (update/delete/insert). If you … …
- Most searched keywords: Whether you are looking for oracle – ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Stack Overflow This happens when a session other than the one used to alter a table is holding a lock likely because of a DML (update/delete/insert). If you …
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Sửa lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Tin Học Sóc Trăng – tinhocsoctrang.com
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Sửa lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Tin Học Sóc Trăng – tinhocsoctrang.com
Khi bạn thao tác trên cơ sở dữ liệu với Oracle, có thể gặp phả lỗi: ORA-00054: resource busy and acquire with NOWAIT specified or timeout … … - Most searched keywords: Whether you are looking for
Sửa lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Tin Học Sóc Trăng – tinhocsoctrang.com
Khi bạn thao tác trên cơ sở dữ liệu với Oracle, có thể gặp phả lỗi: ORA-00054: resource busy and acquire with NOWAIT specified or timeout … Khi bạn thao tác trên cơ sở dữ liệu với Oracle, có thể gặp phả lỗi: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired.tin hoc soc trang, tin học sóc trăng, soc trang it, soc trang, tin hoc - Table of Contents:
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Locks and ORA-00054 error
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- Summary of article content: Articles about Locks and ORA-00054 error Details on locks and the ORA-00054 error … Cause: Resource interested is busy. Action: Retry if necessary. As you see, any session that has referenced the table … …
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired error
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- Summary of article content: Articles about ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired error I was running the database migration script or modifying the database schema and received an error. Symptoms. I received the following error: ORA-00054: … …
- Most searched keywords: Whether you are looking for ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired error I was running the database migration script or modifying the database schema and received an error. Symptoms. I received the following error: ORA-00054: … I was running the database migration script or modifying the database schema and received an error.
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TRẦN VĂN BÌNH MASTER: Hướng dẫn khắc phục lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired và [1]: ORA-08104: this index object 5381076 is being online built or rebuilt
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- Most searched keywords: Whether you are looking for TRẦN VĂN BÌNH MASTER: Hướng dẫn khắc phục lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired và [1]: ORA-08104: this index object 5381076 is being online built or rebuilt Hướng dẫn khắc phục lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired và [1]: ORA-08104: this index object …
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Yawin Tutor
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- Summary of article content: Articles about ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired – Yawin Tutor ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired … The error will be displayed to Oracle users who attempt to execute a LOCK TABLE … …
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
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- Summary of article content: Articles about ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired When you run any DDL ( alter, drop, truncate ), LOCK TABLE or SELECT FOR UPDATE, you can get this error. ORA-00054: resource busy and acquire … …
- Most searched keywords: Whether you are looking for ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired When you run any DDL ( alter, drop, truncate ), LOCK TABLE or SELECT FOR UPDATE, you can get this error. ORA-00054: resource busy and acquire … You can get ” ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired ” error.
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ORA-00054 resource busy and acquire with NOWAIT specified or timeout expired
Troubleshooting issues where âORA-00054: resource busy and acquire with NOWAIT specified or timeout expiredâ errors are being encountered
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- Summary of article content: Articles about Troubleshooting issues where âORA-00054: resource busy and acquire with NOWAIT specified or timeout expiredâ errors are being encountered Oracle Database – Enterprise Edition – Version 9.0.1.0 and later: Troubleshooting issues where “ORA-00054: resource busy and acquire with … …
- Most searched keywords: Whether you are looking for Troubleshooting issues where âORA-00054: resource busy and acquire with NOWAIT specified or timeout expiredâ errors are being encountered Oracle Database – Enterprise Edition – Version 9.0.1.0 and later: Troubleshooting issues where “ORA-00054: resource busy and acquire with … Oracle Database – Enterprise Edition – Version 9.0.1.0 and later: Troubleshooting issues where âORA-00054: resource busy and acquire with NOWAIT specified or timeoutHANGING, LOCK, My Oracle Support, ORA-00054, ORA-54
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ORA-00054: resource busy and acquire with NOWAIT specified DBACLASS
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- Summary of article content: Articles about ORA-00054: resource busy and acquire with NOWAIT specified DBACLASS ORA-00054: resource busy and acquire with NOWAIT specified … While creating an index or doing DDL change on a table, getting resource busy error. … We can see, … …
- Most searched keywords: Whether you are looking for ORA-00054: resource busy and acquire with NOWAIT specified DBACLASS ORA-00054: resource busy and acquire with NOWAIT specified … While creating an index or doing DDL change on a table, getting resource busy error. … We can see, … ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired, There seems to be a session locking this object.
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
There is a very easy work around for this problem.
If you run a 10046 trace on your session (google this… too much to explain). You will see that before any DDL operation Oracle does the following:
LOCK TABLE ‘TABLE_NAME’ NO WAIT
So if another session has an open transaction you get an error. So the fix is… drum roll please. Issue your own lock before the DDL and leave out the ‘NO WAIT’.
Special Note:
if you are doing splitting/dropping partitions oracle just locks the partition. — so yo can just lock the partition subpartition.
So… The following steps fix the problem.
LOCK TABLE ‘TABLE NAME’; — you will ‘wait’ (developers call this hanging). until the session with the open transaction, commits. This is a queue. so there may be several sessions ahead of you. but you will NOT error out. Execute DDL. Your DDL will then run a lock with the NO WAIT. However, your session has aquired the lock. So you are good. DDL auto-commits. This frees the locks.
DML statements will ‘wait’ or as developers call it ‘hang’ while the table is locked.
I use this in code that runs from a job to drop partitions. It works fine. It is in a database that is constantly inserting at a rate of several hundred inserts/second. No errors.
if you are wondering. Doing this in 11g. I have done this in 10g before as well in the past.
Sửa lỗi ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
Khi bạn thao tác trên cơ sở dữ liệu với Oracle, có thể gặp phả lỗi: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired.
Nguyên nhân
Ngôn ngữ định nghĩa dữ liệu (DDL – Data definition language) – dùng để định nghĩa cấu trúc của cơ sở dữ liệu. Ngôn ngữ thao tác dữ liệu (DML – Data manipulation language) – dùng để định nghĩa các thao tác trên cơ sở dữ liệu của bạn.
Để đảm bảo tính toàn vẹn dữ liệu, cơ sở dữ liệu sẽ khóa một bảng hoặc một hàng trong bảng đó trước khi cập nhật hoặc lấy dữ liệu. Do DDL và DML ảnh hưởng đến tất cả các hàng trong một bảng nên vì thế nó cần một khóa Exclusive lock và các khóa hiện có trên bất kỳ hàng nào trong bảng đó đều dẫn đến lỗi.
Exclusive lock, hay còn gọi là read-write lock (khóa đọc ghi) là loại khóa mà một luồng xử lý phải sở hữu khi muốn cập nhật một vùng nhớ được chia sẻ.
Trong Oracle, khi DDL và DML gặp phải một khóa, chúng ta sẽ nhận được thông báo lỗi: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired.
Hướng giải quyết
Tìm và tắt những phiên nào gây cản trở đến exclusive lock.
Trong Oracle 11g, bạn có thể đặt ddl_lock_timeout, ví dụ, cho phép DDL chờ một đối tượng, chỉ cần chỉ định thời gian bạn muốn nó chờ đợi bằng câu lệnh:
SQL> alter session set ddl_lock_timeout = 600;
Session altered.
Chúc bạn thành công.
ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
ORA-00054 Error Message
Error ORA-00054 is a commonly seen error by Oracle users and occurs when a user tries to execute a LOCK TABLE or SELECT FOR UPDATE command with the NOWAIT keyword when the resource is unavailable. DDL or DML operations are being run concurrently without proper commits. In most cases, Error ORA-00054? occurs from a session. Any session that has referenced the table and any structural change attempt, such as adding a column, requires an “exclusive” lock.
There are several options for tables or views to see locks and specific information about the locks:
DBA_BLOCKERS: Shows non-waiting sessions holding locks being waited on
DBA_DDL_LOCKS: Shows all DDL locks held or being requested
DBA_DML_LOCKS: Shows all DML locks held or being requested
DBA_LOCK_INTERNAL: Displays 1 row for every lock/latch held or being requested with the username of who is holding lock
DBA_LOCKS: Shows all locks/latches held or being requested
DBA_WAITERS: Shows all sessions waiting on but not holding waited for locks
The first step the user should take in fixing this error is to wait a few minutes, then try the command again. This simple step may solve the problem. If this does not work, identify the database session locking the object and kill this session.
To identify the session, write the following SQL statement:
select a.sid, a.serial#
from v$session a, v$locked_object b, dba_objects c
where b.object_id = c.object_id
and a.sid = b.session_id
and OBJECT_NAME=’EMP’;
To kill the session and unlock the tables, write the following statement:
SQL>alter system kill session ‘sid, serial#’;
Another option to fix this error in Oracle 11g is to make your table read-only to prevent DML.
Take the following SQL statement example:
SQL> alter table emp add (cust_id varchar2(3));
To alter the session table, execute the following:
SQL>alter table emp read only;
SQL> alter table emp add (cust_id varchar2(3));
Another solution in Oracle 11g is to create a timeout to set how long you want DDL to wait for the object to become available. To set a timeout, write the following statement:
SQL> alter session set ddl_lock_timeout = time_to_wait;
SQL> alter table emp add (cust_id varchar2(3));
To avoid seeing Error ORA-00054? in the future, practice the following tips:
Execute DDL during off-peak hours when the database is idle, such as late at night.
Execute DDL during a maintenance window when all the end-users are locked out.
Identify and kill the session that is preventing the exclusive lock.
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