13
votes
0answers
219 views

Service broker was backed up, now receiving, but doesn't seem to be processing

Having a problem with Event Notifications. On the machine/drive/database that the messages are sent to (receiver), the drive filled up when nobody was looking, so it's been backed up all day. Now ...
11
votes
0answers
431 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 ...
9
votes
0answers
247 views

ROW_NUMBER() OVER (PARTITION BY B,A ORDER BY C) doesn't use index on (A,B,C)

Consider these two functions: ROW_NUMBER() OVER (PARTITION BY A,B ORDER BY C) ROW_NUMBER() OVER (PARTITION BY B,A ORDER BY C) As far as I understand, they produce exactly the same result. In other ...
9
votes
0answers
437 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 ...
9
votes
0answers
239 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 ...
8
votes
0answers
159 views

SQL Server - Handling localization of strings in nested non-deterministic view stacks

While profiling a database I came across a view that is referencing some non-deterministic functions that get accessed 1000-2500 times per minute for each connection in this application's pool. A ...
8
votes
0answers
354 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 a ...
7
votes
0answers
225 views

How to reload a linked server?

I am using Microsoft SQL Server 2014 Enterprise Edition. A problem occurs with the linked servers where it is necessary to restart the server, or to stop the MSSQLSERVER service. When the server is ...
7
votes
0answers
356 views

Performance inner join vs left join involving parallelism

I have a query which takes about 8 hours to finish. Simplified, the query looks something like this: SELECT [Some attributes, inconsequential] FROM RBM.Financial_Events RFE INNER JOIN ...
7
votes
0answers
3k views

Mongodb incremental backups

I was given the task to setup incremental backups for mongodb replicaset, as start point of course I googled about it and could not find anything on mongodb docs, I did find however this question ...
7
votes
0answers
456 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 ...
6
votes
0answers
109 views

SQL Server Sharding strategy optimization

I have implemented a sharding solution for our SQL Server databases as per the MSDN documentation here: https://msdn.microsoft.com/en-gb/library/dn589797.aspx This has been running for around 6 ...
6
votes
0answers
245 views

How can I seamlessly upgrade the major version of an AWS RDS postgres database?

This morning I was involved in upgrading a PostgreSQL database on AWS RDS. We wanted to move from version 9.3.3 to version 9.4.4. We had "tested" the upgrade on a staging database, but the staging ...
6
votes
0answers
113 views

insufficient history for index

In MySql log, there is one error `InnoDB: insufficient history for index 0' I don't know why its occur. I have done google and found following http://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-...
6
votes
0answers
285 views

Sudden Mongodb high connections/queues, db stops responding

The issue We have a strange issue on our mongodb setup. Sometimes we get peaks of high connections and high queues and the mongodb process stops responding if we let the queues and connections ...
6
votes
0answers
286 views

Why does resource in AlwaysOn fail?

I have two SQL Servers (12.0.4100.1) and Availability Group (AG) configured on them. Sometimes some server hangs. It responds on ping, but RDP connection are not available, SQL Server doesn't respond ...
6
votes
0answers
115 views

Low performance, high availability, replicated key/value store with audit trail

I'm looking for a database system with fairly specific specs. I've looked most of the major relational databases and NoSQL products out there and did not find one that even remotely satisfied my ...
5
votes
0answers
35 views

Excessive Prelogin Packets

Running a client/server application where the client app is powered by MS Access and the database on the server is in SQL Server. We have two locations and have active users at both. We recently moved ...
5
votes
0answers
146 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
164 views

DBCC CheckDB run into early hardware failure

Our production database server (SQL 2008 R2 Enterprise on Windows Server 2008 R2 DC) run into a strange error during its nightly DBCC CheckDB (Prod_DB) since late June. The same job had been running ...
5
votes
0answers
140 views

Server Logon Trigger fails after deleting many records in “Logon-Table” -SQL Error 2801

We have a server logon trigger defined that logs every login with information like windows/sql user name, client and time in a table. The table doesn't have clustered index, but it does have a "PK_ID"...
5
votes
0answers
177 views

Measure SQL Azure Transaction Rate

We are on SQL Azure v12 Standard/S2 Service Tier and are not satisfied with the performance so I am trying to measure where the bottleneck is. I realize that we could be hitting the limits of the S2 ...
5
votes
0answers
868 views

Getting multiple queries with “show transaction isolation level” in pg_activity

I am using PostgreSQL server for my production use. When I fire a query like select * from pg_stat_activity on my server, I am getting 98% of queries like SHOW TRANSACTION ISOLATION LEVEL and ...
5
votes
0answers
2k views

Is there a Postgres admin GUI that can execute a master file containing multiple sql files

I'm developing a really long script. I'd like to break the script into smaller, more manageable scripts and include each sql file in a master file, then just execute the master file. example: master....
5
votes
0answers
9k views

How to use SUBSTRING using REGEXP in MySQL

I have the following situation. I have to substring regular expression from description using MySQL. Description: Lorem D9801 ipsum dolor sit amet Where D9801 is REGEXP. Every strong text ...
5
votes
0answers
6k views

SQL*Plus, @, and relative paths

Somehow, it seems that SQL*Plus (at least on Windows) is unable to locate a script with a relative path when called with @@ and when the path starts with a single or double dot. For example, under x:\...
4
votes
0answers
77 views

Why different datetimes freezes a query based on indexes?

I have a table with a billion records. It has these columns: Id bigint, MobileNumber varchar(100), Date datetime, Message nvarchar(400) And it has non-clustered indexes on MobileNumber and Date ...
4
votes
0answers
59 views

Columnstore index and low selective columns

I have a table with almost 1T rows. create table bigtable ( K1 int, K2 date, -- PK columns C1 ..., C8 ...., -- columns with various data types like float, date, varchar, ... B1 bit, B2 bit, .......
4
votes
0answers
54 views

HADR high worker thread usage

Why would an availability group's number of worker threads in an HADR pool increase well beyond minimum usage of "typically, there are 3–10 shared threads" per replica? In one case we've observed ...
4
votes
0answers
51 views

Large Variation in Bulk Insert time

So I have a simple Bulk Insert process to take data from our staging table and move it into our datamart. The process is a simple data flow task with default settings for "Rows per batch" and the ...
4
votes
0answers
54 views

SQL Server logins “un-sync” when Availability Group fails over

I have 2 SQL Servers in an Availability Group. The logins are manually synced – same SID, same Password Hash, etc. on both replicas – and the user can log in via the listener to the primary replica. ...
4
votes
0answers
59 views

Postgres query running faster, when running on more data

* Update * After several days, I re tried the query. Suddenly the performance was similar for older date_id's (using in (X,X) and =X), however, the problem still persists with new date_id's. I guess ...
4
votes
0answers
484 views

MySQL 5.7 + Ubuntu 14.04 eating up my RAM

I've recently installed MySQL 5.7.11 in my Ubuntu 14.04.3 system following these instructions: http://dev.mysql.com/doc/mysql-apt-repo-quick-guide/en/ Being totally empty and not being called by any ...
4
votes
0answers
109 views

Restored DB has data, DBCC CHECKDB is clean, but SELECT TOP 1 returns zero rows

Having restored a client's SQL 2014 EE DB onto our Developer Edition instance, without issue, then running a DBCC CHECKDB that found zero errors, and a clustered columnstore index alleging over 1Bn ...
4
votes
0answers
61 views

VLDB is stuck in recovery state. It's a permission issue, now what should I do?

SQL Server database which is very large (4TB) is stuck in recovery state. Reason: Data center had a planned downtime and we had to turn the physical machine off and when it turned on, as I read in ...
4
votes
0answers
91 views

Nothing to do, no schemas or tables selected on export

I'm using MySql Workbench 6.3.6, on Windows 10, which has all updates. I have previously been able to get a data dump from this database. Now I can't get any from any of the schemas I have open in ...
4
votes
0answers
64 views

Use case for hstore

This is the first time (I think) I have the chance to use the hstore data type, but I would like to hear from more experienced folks if what I have in mind is actually a good idea. Now, there's this ...
4
votes
0answers
87 views

PostgreSQL: Add or drop column under load give wrong number of columns errors

I have a heavily used PostgreSQL database. Sometimes I need to add/remove columns, preferably without any service interruptions. I follow the safe operations list from https://www.braintreepayments....
4
votes
0answers
195 views

How can we improve this PIVOT operation? ( SQL Server 2008 R2 )

We have this query, that runs in 1:10. We need to improve this. This is just a test query, but we will implement this upgrade on our real query. select top 100 * from ( select codCliente ,...
4
votes
0answers
109 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
358 views

Interpreting sys.dm_os_sys_memory

I try to figure out a way(using only TSQL) to determine if and how much the PAGEFILE (I will capitalize this term if I refer to the windows page file from now on) is used (like pagefileusage% counter)....
4
votes
0answers
87 views

Take action from extended event?

I've seen it mentioned a few times that you can configure an event session to take an action when an event fires. Does anyone have any information on how to do this? I know that you can use the ...
4
votes
0answers
153 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
236 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
70 views

Can SQL Server use a spatial index and another index at the same time and be efficient?

Let's say we have a table that contains two terrain datasets defined by TerrainModelID like below: CREATE TABLE [dbo].[DigitalTerrain]( [DigitalTerrainID] [uniqueidentifier] NOT NULL, [...
4
votes
0answers
326 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
89 views

Why is the lease locked for a some full sql backups to Azure Blob using Ola Hallengren backup scripts?

I'm using SQL Server 2012 and working on backing up to Azure Blob using Ola Hallengren backup scripts. Some backups are lease locked (ex. model) while others are not (ex. msdb). It's inconsistent, it ...
4
votes
0answers
10k views

psql: FATAL: sorry, too many clients already

I am suddenly getting this error when either trying to access the website that uses the postgresql database, or even when using the psql utility or pgadmin3. My database is set to handle 150 maximum ...
4
votes
0answers
146 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
406 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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