-1
votes
0answers
16 views

sql Express 2008 db size

I have an SQl Express server 2008 database file whose size is 94kb, when i run the script to install the database on SQL express server 2008 r2 its size it shows 3.49 GB (3,750,756,352 bytes), log ...
1
vote
0answers
114 views

MongoDB Performance Troubleshooting

I have a small MongoDB replica set (2.4.6) and it seems about once a week, the primary gets bogged and the load average spikes up. This app doesn't see a huge amount of traffic. It resides in EC2 ...
1
vote
1answer
249 views

InnoDB Buffer pool hit rate missing from engine status output

I want to check the buffer pool hit rate for InnoDB on MySQL but when I query the database the hit rate seems to be gone from the results: Using query: SHOW ENGINE INNODB STATUS\G ...
0
votes
2answers
131 views

Postgresql performance enhancement

I have my setup like this: Two separate instances of the database on a clustered environment. Both instances are on dedicated servers each carries up to the standard configurations. Instance one ...
0
votes
2answers
135 views

PostgreSQL, automate REINDEX, Windows environment

I have a couple of PostgreSQL tables (9.1) which are inserted to / deleted from often. Over time they suffer from index bloating even though the autovacuum is configured and runs regularly. I'm ...
1
vote
1answer
2k views

How to calculate max_connections for PostgreSQL and default_pool_size for pgbouncer?

Is there a rule or something I can use to calculate a good number for max_connections, default_pool_size and max_client_conn? The defaults are odd. PostgreSQL defaults to max_connections=100 while ...
1
vote
2answers
244 views

Low priority batch processes on live Mongo database

We want to run MapReduces on our live Mongo database, mainly so that we can extract metrics. However, we've had some bad outages caused by these MRs bogging down the Mongo server (in particular 100% ...
2
votes
1answer
52 views

Consolidating SQL Server

We have a number of SQL Server 2008 R2 standard servers, each for a single application that we'd like to consolidate into one physical server. Running perfmon on these servers they're not using a ...
0
votes
1answer
306 views

How often would you run the Postgresql maintenance tasks

After reading the Postgresql documentation, we found that it's recommendable to run the Vacuum tasks daily: We recommend that active production databases be vacuumed frequently (at least nightly), ...
0
votes
1answer
68 views

Validate SQL Server partitions and filegroups

Information: I took over a SQL Server 2005 that the previous DBA had configured three filegroups to segregate the data onto unique LUNs: G: Data (Primary) F: Audit J: Index However, the ...
0
votes
1answer
115 views

Mysql slow query log issue…?

Analyzing the slow query log of my mysql database server, i found an interesting query taking more time and making issues in performance of my application.Please help me to find out the issue ? # ...
2
votes
2answers
4k views

How well does PostgreSQL perform with a large number of databases?

We have an web application whose architecture requires that any registered user (a company, actually) should be isolated from the other, i.e., I'll run the same webapp with the same data models, but ...
1
vote
3answers
2k views

MySQL maintenance - how to clear the buffer?

We have a server running our web app (PHP / MySQL) which is SLOW. My predecessor says that: "We use to do database maintenance, which use to clear the buffer, cached and unwanted variables." And I ...
0
votes
1answer
206 views

long dataset of small rows — infrequent writes, very frequent reads — what's the best platform?

A part of the platform I am building requires a large data table (starting at tens of millions of records, scaling to hundreds of millions within a year or two, maybe reaching billions at some point). ...
0
votes
1answer
86 views

Reccomendation for tuning 100's of SQL Databases

I'm running several SQL servers, each running a few hundred multi-gig databases for customers. They are all setup homogeneously as far as the schemas are concerned, however customer usages of the ...
1
vote
0answers
450 views

SQL 2008 Database tuning advisor won’t start

For some reason I can't get DTA to connect to my development machine. It connects to a remote DB just fine but when I point it to my dev machine I get an error saying: Failed to initialize MSDB ...