17
votes
0answers
424 views

Is sys.stats_columns incorrect?

Let's say I have a table Foo with columns ID1, ID2 and a composite primary key defined over ID2, ID1. (I'm currently working with a System Center product that has several tables defined this way with ...
12
votes
0answers
369 views

How to handle bad query plan caused by exact equality on range type?

I'm performing an update where I require an exact equality on a tstzrange variable. ~1M rows are modified, and the query takes ~13 minutes. The result of EXPLAIN ANALYZE can be seen here, and the ...
10
votes
0answers
2k views

There is insufficient system memory in resource pool 'internal' to run this query

One of our production servers is reporting an error in the log Error: 701, Severity: 17, State: 123. There is insufficient system memory in resource pool 'internal' to run this query. I ...
8
votes
0answers
137 views

SQL Server Services empty in SQL Server configuration

As I upgraded from Windows 8.1 to Windows 10, I noticed that the SQL Server Services in SQL Server Configuration Manager is empty. SQL Server still works perfectly well at the moment. SQL Server 2014 ...
8
votes
0answers
686 views

AlwaysOn Availability Group error after Windows Update in environment without a failover cluster

Our SQL Server service was down this morning which brought down some of our websites. When I went to check the Windows Event Viewer I saw the following errors: Script level upgrade for database ...
8
votes
0answers
617 views

Trace Flag 1222 Not Working?

I have a customer site with two similarly configured 2008r2 SQL Servers "A" and "C". On both servers the trace flags 1204 and 1222 are enabled and DBCC tracestatus shows the following on both ...
8
votes
0answers
286 views

Modification to GEQO (Genetic Query Optimization) of PostgreSQL

I need to implement a functionality that is in line with the GEQO functionality of PostgreSQL. I understand that GEQO approach is to encode query plans as integer strings and GEQO generates these ...
8
votes
0answers
432 views

Excessive compile blocking on sp_procedure_params_90_rowset

A resurgence of this question Blocked-process-report: what is this waitresource "OBJECT: 32767:124607697:0 [COMPILE] on MSDN: I have caught these statements in Profiler. They all have durations over ...
8
votes
0answers
189 views

9i streams capture doesn't evaluate rules

I have a streams replication set up between two oracle 9.2.0.8 instances as sources and an 11g instance as a destination, processing a small subset of data from each database (let it be one table ...
7
votes
0answers
135 views

Why is query thousands of times slower with DESC?

I have a PostgreSQL database (AWS RDS) and ran the following queries in psql: livenet=> EXPLAIN ANALYZE SELECT * FROM outputs ORDER BY height LIMIT 10; Limit (cost=0.57..36.82 rows=10 ...
7
votes
0answers
147 views

How to set MSDN in order to open on a certain version of Microsoft SQL Server?

In a network, there are certain different installed versions of Microsoft SQL Server, starting with 2005, 2008 and 2008 R2. Is there a specific option of MSDN that can fix the opening of new pages on ...
7
votes
0answers
271 views

How to properly troubleshoot Merge Replication False Conflicts

We have SQL Server 2008 R2 Merge Replication setup. Lately I started getting conflicts for some tables, and when I check the conflict viewer, I can see that the winner & the loser column values ...
6
votes
0answers
80 views

stats_column_id and index_column_id do not update with physical order of clustered index is changed

Unless I'm misunderstanding the purpose of the column, the following code indicates that a change of the structure of the clustered index does not change the ordinal position (stats_column_id)of the ...
6
votes
0answers
219 views

PostgreSQL Transaction Committing for hours

I'm running into an issue whereby I have two connections from a user to my PostgreSQL server which have been running for about 4 hours and have been in a commit state for quite some time (at least 1 ...
6
votes
0answers
478 views

Did the Change Tracking internals change from SQL Server 2008 to 2012?

In trouble shooting an issue with synchronizing disconnected devices with a central database server, we are experiencing a problem after upgrading to SQL Server 2012 on the server. It appears that the ...
6
votes
0answers
383 views

SQL Server Sproc calls from IBM Cast Iron orchestration with XML payload fail

I'm hoping that someone on this forum may have experience with an IBM appliance, Cast Iron (Websphere), and how it interacts with SQL Server. I know very little about the Cast Iron appliance, and its ...
5
votes
0answers
48 views

ANALYZE strategy for big tables in PostgreSQL

In our PostgreSQL 9.4.4 database we have a table that receives around 600k new records each day. Each day, nightly, we are performing some ETL exports from the table. If it has not been analyzed ...
5
votes
0answers
53 views

Complete deadlock on PostgreSQL 9.3 after removing a numeric id

The problem - complete DB lock after a schema change Architecture I use a PostgreSQL 9.3 with PostGIS to store location updates. The updates are written to two tables - location_updates and ...
5
votes
0answers
65 views

Very high transactions per second

Our production server runs on average 4,000 transactions per second. In the past few days the average has jumped to 175,000 transactions per second. That is not a typo, it's 175K per sec. Looking at ...
5
votes
0answers
128 views

Why is my PostgreSQL ORDER BY case-insensitive?

I have Postgres 9.4.4 running on Debian and I get the following ORDER BY behavior: veure_test=# show LC_COLLATE; lc_collate ------------- en_US.UTF-8 (1 row) veure_test=# SELECT ...
5
votes
0answers
177 views

The curious case of HADR_SYNC_COMMIT waits

We are noticing an interesting pattern for HADR_SYNC_COMMIT waits in our environment. We have a three replica; one primary, one sync secondary and one async secondary in a datacenter and we just added ...
5
votes
0answers
74 views

Which to trust?

We are troubleshooting a long-running issue with a vendor. Their software has a tendency to freeze up and stop working once or twice a week causing major disruptions to our operation. They have been ...
5
votes
0answers
210 views

Why is my Azure SQL Server so slow?

We currently have a VM that is very underpowered and are proposing to move to an Azure VM with better specs. The problem is, the Azure VM is much slower than the original VM even though it is of a ...
5
votes
0answers
34 views

Failover timeout problem

I'm looking for an additional bit of help with regard to some problems I'm looking at for one of my company's clients. Basically I have two related problems with regard to a 2-node active/active ...
5
votes
0answers
56 views

6GB Table - 37Mi Rows - 'System.OutOfMemoryException' - SQL 2008 R2

I have a proc, looping through databases( the insert is in a fix database...the select uses the loop ), making inserts (Will hide names for security): insert into Main_Database..Table(16 Fields) ...
5
votes
0answers
38 views

SQL Server 2008 R2 Partitioning - same FileGroup, 1 File, 2 partition_numbers - HELP

It's my first go at partitioning in SQL Server, I learned from the Brent Ozar guide which is fantastic :) A few times I have ran into a weird scenario; when I run: SELECT * FROM ph.FileGroupDetail ...
5
votes
0answers
34 views

How does mydumper's ''--use-savepoints" option reduce metadata locking

MyDumper 0.6.1 add a new option --use-savepoints. From the manual, it means: Use savepoints to reduce metadata locking issues, needs SUPER privilege I don't understand. How does it "reduce ...
4
votes
0answers
32 views

Counting show variable result in mysql

I am reading this article and there doesn't seem a way to do something like this: SELECT COUNT(*) WHERE SHOW VARIABLES WHERE Variable_name = 'innodb_ft_cache_size' I can do the below but this ...
4
votes
0answers
54 views

Find Shoe Size Selection

I'm developing a feature that allows users to input their foot dimensions and have the proper shoe size returned to them. I'm having difficulty deciding on the best way to implement this feature. The ...
4
votes
0answers
31 views

Decomposing a relation into 3NF/BCNF

I am having trouble decomposing a relation to 3NF/BCNF. I have determined that for the relation: R (A,B,C,D,E,F,G,H,I) where: {A -> B,C} {E -> F} {D -> I} {A,D -> G} {G -> H} ...
4
votes
0answers
41 views

Running Triggers on Slave with Row-based Events in MySQL >=5.6

We would like to have a setup where a slave has triggers that are not present on the master for the purpose of updating some summary tables or run a specific udfs.sys If one uses statement-based ...
4
votes
0answers
78 views

How to uniquely identify SQL instance

I need to find a way how to identify SQL Instance no matter what changes were done to SQL Server and\or Windows Server where it is running, because we're collecting remotely information about ...
4
votes
0answers
63 views

Torn page SQL Server 2008 R2 RTM

DBCC results for 'bad_db'. Msg 8939, Level 16, State 98, Line 1 Table error: Object ID 0, index ID -1, partition ID 0, alloc unit ID -6794535623816839168 (type Unknown), page (26876:998677113). Test ...
4
votes
0answers
548 views

SQL Server 2014 Replication - The process could not connect to Subscriber 'xxx'

I have just set up very basic transactional replication on SQL Server 2014. The Publisher and Distributor are one and the same. I have configured the Publisher to push to the Subscriber, so any and ...
4
votes
0answers
82 views

Can an active session in oracle be dead?

I have a time consuming query which populates a materialized view. It has been running for 18 hours - which was not expected. SELECT STATUS FROM V$SESSION WHERE SID=194; The above query shows the ...
4
votes
0answers
280 views

Get inserted row count when master table isn't modified

I have a partitioned table where data resides only in the child tables. The master table has an insert trigger that will distribute inserted data into appropriate child tables. Now, I need to create ...
4
votes
0answers
108 views

How long does it take before an index on table makes a difference?

We are using SQL server 2008. We are doing a root-cause analysis on an event in production and trying to explain everything. This is the scenario: We had a query that runs twice a minute and takes 4 ...
4
votes
0answers
70 views

Migrating VLDB to AlwaysON AG

I have been using AlwaysON AG for a long time now and currently have about 10TB of data across 120 databases and 3 AG groups for any application that is on SQL 2012 with great success. Each AG group ...
4
votes
0answers
96 views

When does SQL Server acquire locks?

The list of isolation levels in SQL Server found here states that write locks acquired within a transaction are retained until the end of the transaction. However it doesn't mention anything about ...
4
votes
0answers
103 views

Find out why SQL Server released memory

I have a SQL Server 2008 R2 used for sharepoint and ssrs. The SQL Server hosts two instances. For a few minutes both instances were timing out, not responding. CPU slowly rose to 100%, 30% from ...
4
votes
0answers
136 views

Intermittent SQL Server connectivity issues in production

I am running an ASP.NET based application, running on two load-balanced web servers, that communicate with a SQL Server 2008 R2 database running on a separate server on the same network in the ...
4
votes
0answers
111 views

Why could a SQL Server table grow far quicker than the data to it?

I've got an audit table in SQL Server 2008 R2 that has the following structure: CREATE TABLE [AuditInstance]( [oid] [int] NOT NULL, [AuditTransactionOID] [int] NULL, [pid] [int] NOT NULL, ...
4
votes
0answers
174 views

ST_GeomFromGeoJSON() Causes postgres to crash

I'm running into a strange problem which I can't solve. The server crashes when executing some postgis related queries. After some debugging, using the examples provided by postgis, it appears the ...
4
votes
0answers
244 views

Can't use Fuzzy Lookup in BIDS

A coworker of mine was having an issue with BIDS. He's doing a simple fuzzy lookup and is only looking against two rows(For Testing Purposes). The weird thing is that when he tries to execute an ...
4
votes
0answers
1k views

Use LDAP for name look up with Oracle Instant Client

Partly as a result of having problems with conflicting versions or bitness with the full installation of Oracle client, my development team (of which I'm a member) has been moving towards using Oracle ...
4
votes
0answers
110 views

Postgres multidisk master replicating to single disk slave

I have an odd situation. I have a postgreSQL database master with multiple large tablespaces divided across 3 physical disks. I am setting up a slave that will be used to offload long, ...
4
votes
0answers
431 views

PostgreSQL custom operator for equality

I want to build a custom equality operator in PostgreSQL, which can be used in GROUP BY, UNION and DISTINCT [ON] for the json type (just for the sake of curiosity, not for real-world implementation -- ...
4
votes
0answers
106 views

Transforming table to third normal form

I have a table like this: L(A, B, C, D, E) and functional dependencies are: AB -> CDE C -> D D -> B D -> E I need to transform this table into 3NF. I think it's not even in 2NF. I ...
4
votes
0answers
1k views

How to troubleshoot “client driver has sent multiple requests while the session is in single-user mode”

I'm working with a developer who is struggling to stop the following error: The server will drop the connection, because the client driver has sent multiple requests while the session is in ...
4
votes
0answers
309 views

RDS MYSQL instance rebooted and won't load INNODB table

So my production db in RDS apparently either crashed or was rebooted during a version update, and upon being restarted mysql couldn't load one of the innodb tables: as evidenced by the following error ...

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