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1
vote
1answer
36 views

False positive error message in MS Access (concurrent users)

I have discovered a strange apparent bug in MS Access and would like to know if others know it already and hopefully how to get around it. Trying to count records based on known column categories. ...
2
votes
0answers
64 views

os_buffer_descriptors blocking problem SQL Server 2008 R2

The following query : select (buffer_descriptors.datacache) as 'Data Cache (MB)', case when buffer_descriptors.datacache > 4096 then (((buffer_descriptors.datacache)/4096)*300) else ...
8
votes
3answers
7k views

Tracing, debugging and fixing Row Lock Contentions

Off late, I've been facing a lot of row lock contentions. The table in contention seems to be a particular table. This is generally what happens - Developer 1 starts a transaction from Oracle ...
2
votes
1answer
305 views

Intent Exclusive (IX) Lock questions [closed]

I was experiencing a deadlock so I set up a trace flags as well as profile trace to capture a deadlock. During this exercise I found something interesting. In the profile trace I noticed that "sa" ...
7
votes
1answer
2k views

Unexplained InnoDB timeouts

I've been seeing some very basic updates timing out lately and have not been able to determine the cause. An example: //# Query_time: 51 Lock_time: 0 Rows_sent: 0 Rows_examined: 0 UPDATE photos ...
5
votes
2answers
583 views

SQL Server - RangeX-X and RangeI-N locks

I came to a dead point in a deadlock analyze. According to msdn: RangeX-X are Exclusive range, exclusive resource lock; used when updating a key in a range. RangeI-N are Insert range, null resource ...
5
votes
1answer
8k views

How can I remove locks on an object?

One of my queries is running in to a Row Lock Contention. I've tracked down which table is causing that - so now what's the next step ? Which session is causing this table to get locked ? How do I ...