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2
votes
2answers
80 views

Moving data from table with VARCHAR(50) fields to table with numeric fields increases table size

I want to understand why migrating data in a table with all VARCHAR(50) fields to a table with optimized smaller types caused the new table (containing 61,065,164 rows) to be 4.46 GB, which is larger ...
6
votes
2answers
345 views

What effect will reducing the size of a varchar column have on the database file?

We have a number of tables in our database that have VARCHAR(MAX) columns where a VARCHAR(500) (or something much smaller than max) will suffice. Naturally I want to clean these up, and get the sizes ...
1
vote
1answer
35 views

PostgreSQL: Foreign key on string column

I'm currently in a process of redesigning a legacy database. One of the tables primary key is a varchar(254). I need to create a table relating to it. So for example: create table "Item" ( ...
0
votes
2answers
34 views

Will reindexing use the empty space or just grow table?

I have a table which is 170 GB and it has 98 GB of free/empty space. The free space was created by a massive deletion. If I run DBCC REINDEX or ALTER INDEX REBUILD, will the index use that free space ...
4
votes
4answers
141 views

Disk Space usage

Is there a way i can get a report or create a custom report in sql server 2012 which can update me with disk space available & actual disk space for listed drives twice or once a day. I need this ...
2
votes
1answer
38 views

MongoDB - real disk usage is LOWER than dbStats.storageFile

I'm a bit surprised by what I observe in my mongo server, so I would like to know if anybody understand how this is possible. I have one collection of around 15K documents. For each of them, I store ...
2
votes
3answers
447 views

Releasing Free Space

I am running a rather large database on SQL Server 2008 R2 Express. Recently I hit the 10GB limit, so the system would not allow me to create anymore objects, ect.. I have archived off a very large ...
3
votes
1answer
56 views

reporting space consumption to files in filegroup - how to reverse-engineer the algorithm spreading data across files

I would like to know how to calculate the distribution of data consumed per file in a filegroup, back to the index (HEAP, CLUSTERED, NONCLUSTERED) storing it. My intention is to define which I/O goes ...
2
votes
2answers
78 views

space usage on sys.allocation_units and sp_spaceused

It is a known fact that the DMVs dont hold accurate information regarding number of pages and count of rows. However, when you have the stats updated, I can't see why they wouldn't. I am working on a ...
0
votes
2answers
122 views

Is it normal for tempdb to not give up disk space when it releases things?

So my tempdb is getting huge. Like 200+ GB. USE tempdb GO EXEC sp_spaceused database_name database_size unallocated space tempdb 211668.88 MB 206803.45 MB It's using a SIMPLE ...
0
votes
1answer
112 views

Workaround to avoid read-only table locking during execution of MySql OPTIMIZE command

We need to optimize a large table (on a weekly basis) in order to reclaim disk space, since records are being deleted regularly from the table. The table in question is an InnoDB table and the ...
0
votes
1answer
43 views

increasing disk space for mysql data volume

I have a master mysql server which has approached 80% of the available disk space. Total disk space size is 200GB. Though, it's not an immediate concern but I have to deal with at some point soon. the ...
1
vote
1answer
52 views

postgresql 9.1 failed insert occupies increasing disk space

I have a postgresql 9.1 installation where the available disk space is very low (20Gb) however there is only one client that inserts data in various tables (typically one entry every few minutes) and ...
2
votes
1answer
85 views

How do databases deal with file system fragmentation?

Especially analytic databases that try to optimize for queries that scan large portions of tables instead of randomly accessing specific rows. For example Redshift has a concept of a sort key that, ...
5
votes
1answer
133 views

For alignment optimized table is bigger than original table - why?

In another question I learned that I should optimize the layout from one of my tables to save space and have better performance. I did this, but ended up with a larger table than before and ...
3
votes
3answers
137 views

Log File Management - Space on Disk

At our organisation we have several non-Production environments where Developers run free and wild with TSQL code and databases. The DBA team do not normally monitor or maintain them. Recently several ...
1
vote
1answer
67 views

Detailed optimal column order with large text and bytea

I read this excellent answer on optimal column ordering and noticed the summation: Generally speaking, if you put the 8-byte-types first then the 4-byte-types and the 2-byte-types last you can't ...
2
votes
1answer
425 views

Is DBCC SHOWFILESTATS an accurate way to see unused space?

We have a few tables each with near 100 million rows of data. A co-worker has these tables setup with partitions based on a date field. Our disk space is starting to run low and knowing that ...
2
votes
1answer
245 views

Character varying index overhead & length limit

I have a unique constraint on a character varying column that will mostly have lengths of approximately 600 but could get to 10 million. I have read about B-Trees, but I can't determine how much disk ...
1
vote
0answers
289 views

Backup failed due to lack of hard drive space…how?

I had a maintenance plan fail last night (runs daily) for the first time in ages. The following is the specific error I received, minus the actual database name: Extend Disk Backup: failure on ...
2
votes
0answers
107 views

Postgres: missing disk space after truncate and re-insert

We've got a IP address range dataset stored in a table that was truncated and then re-populated with a slightly modified version of the dataset (almost identical in size). However, after truncating ...
2
votes
1answer
277 views

Huge MSDB database

I have a very large MSDB database and have been working on clearing this out and setting up maintenance tasks - something my predecessor should have done years ago! So far I've managed to truncate ...
1
vote
2answers
77 views

what is better in terms of allocated space in Oracle Tables: NUMBER or BINARY_FLOAT?

I have a 10 billion records table so I need to improve space allocation. My table has only fields of type floating point (single-precision). What is the best choice, NUMBER or BINARY_FLOAT or ...
0
votes
1answer
60 views

EMStagePatches_$ORACLE_SID is using up space

We have this directory: $ORACLE_HOME/EMStagePatches_$ORACLE_SID We are running out of space and this directory is using up a lot of space. Is it safe to delete it? I think it is something to do ...
1
vote
0answers
46 views

Is there a program I can use to redistribute DB files across multiple volumes efficiently?

I'm working with a VLDB instance with over 60 DBs and close to 200 DB files, allocated over nearly 20 volumes. The instance is a Dev server getting periodic restores from a production instance with a ...
1
vote
1answer
466 views

Free space from image column after update

I'm doing some cleanup on one of our database for development purposes on a test server. There are a couple of tables with one IMAGE column. Both tables take roughly 50Gb of space, being the image ...
1
vote
0answers
344 views

MySQL Space efficient way of storing indexed key-value pairs associated with table

We're storing transactions in an accounting system using two tables, one contains the general description of the particular transaction (the other contains the entries, one for each account - which ...
0
votes
0answers
30 views

How can I calculate database disk usage in Oracle? [duplicate]

I'd like to get the real disk usage of a database, i.e. the amount of megabytes or gigabytes (could be any) that the tables use with all of their respective rows.
1
vote
1answer
61 views

1 time shrink of abused databse or restore from backup [duplicate]

I have a database that I have inherited which has been left for a long time to grow and grow. 95% of this growth is caused by 1 log table used by our application. The database is 120GB and in full ...
0
votes
0answers
2k views

ASM drop disk hangs (STATE DROPPING)

I have added disk into the RAC system by the following way: I have disk /dev/sdh1. Marked it as an ASM disk: --On node 1 oracleasm createdisk DISK7 '/dev/sdh1'; --On node 2 oracleasm ...
0
votes
1answer
216 views

DB disk space requirements comparision between MySQL versions

I have 2 labs where MySQL is installed. DataBases are created and deleted dynamically by certain internal processes. InnoDB is the Engine used. In one lab, MySQL version 5.0.77 is installed. The DB ...
1
vote
1answer
139 views

sql server database size shown different in properties pane

while monitoring when checking database space used,my favorites are use indexinternals sp_spaceused select (sum(size)*8)/1024 as size From sys.master_files where name like 'indexinternals%' ...
0
votes
1answer
106 views

Disk I/O High Activity [closed]

What does the green and blue indicate from the below scrteenshots of disk activity on SQL Server database server? Thanks!
0
votes
2answers
138 views

RMAN restore to lower disk space

I have 30.7GB backup file generated from RMAN. The original ./datafile is 950.28GB. According to previous DBA, there is a lot of free space in table space. Now, I have 300GB free disk space in hard ...
2
votes
1answer
864 views

Postgres on Engineyard space at 100%, pg_xlog filled up with files

I have a database that is growing rapidly. VERY rapidly. My /db directory is at 100% now, and there are a bunch of new files in pg_xlog. My background is in Oracle and MySQL. I do not know what is ...
1
vote
0answers
5k views

Failure Of Backup Due To Limit Exceeded For Recovery Files Since Cannot Reclaim Disk Space [RMAN-03009,ORA-19809,ORA-19804]

While I try to take incremental backup level 0 by using the command RMAN> backup incremental level 0 database plus archivelog; , encountered this error. RMAN-00571: ...
1
vote
2answers
192 views

How do I track why my SQL Azure occupied space pulsates?

This is inspired by this StackOverflow question. I have this code: SELECT CONVERT(INT, SUM(reserved_page_count) * 8 / 1024) FROM sys.dm_db_partition_stats for detecting database space consumption ...
2
votes
1answer
1k views

InnoDB: Error: pthread_create returned 12

have installed MySQL in a particular folder. I was able to run the server and create accounts, databases etc. However, now whenever I try to start the server, I get an error: $ mysqld_safe ...
5
votes
1answer
949 views

PostgreSQL strategies to deal with disk filling up

I'm using PostgreSQL (8.4) to store data produced by an application making frequent inserts (in the table structure described below). The database keeps growing with time and, since the newer data is ...
4
votes
1answer
255 views

How large are blocks of data in SQL Server?

I'm working in SQL Server 2008 R2 and have created a query that gathers and sums the total of data files and log files' sizes. However, I can't find how much actual disk space a single block of SQL ...
2
votes
1answer
229 views

How big can innodb_doublewrite_file grow?

When I use the enable innodb_doublewrite_file ... How big can this file grow ? How can I calculate the optimal disk size, if it would be used only for this file?
1
vote
1answer
680 views

Optimizing disk space for MyISAM tables: what is the benefit of ALTER and ANALYZE if you already do OPTIMIZE?

Per this post, in order to optimize the storage of a MyISAM table, you need to: OPTIMIZE TABLE ; ALTER TABLE ENGINE=MyISAM ; ANALYZE TABLE ; It's obvious what OPTIMIZE does for disk space but what ...
1
vote
2answers
6k views

Database running out of space

My database has 16MB of space left. I used to just truncate as I was taught but I found these links that advise against truncating: ...
4
votes
2answers
2k views

Partitioning and freeing disk space

I am running MySql innodb with innodb_file_per_table. As a daily script, I would like to create a new partition for a set of tables, as well as delete yesterday's partitions. What command would need ...
3
votes
2answers
4k views

Disk space full but logical space available in database

We have a fairly big MS SQL 2008R2 database that resides on a SSD drive. The drive itself only has ~110Gb of space, and the database files are the only files on the drive. The database is in "Simple" ...
1
vote
0answers
116 views

SQL Server 2005 Unexpected Disk Usage during Backups [closed]

On our SQL Server 2005 SP4 server we have a maintenance plan in place which performs a full backup of selected databases on a nightly basis. The databases are configured in Simple recovery mode and ...
2
votes
2answers
82 views

View Disc Usage

Is this statement correct? Behind the scenes SQL Server actually stores the data in the view as a physical table which must be updated if any of the data behind the view changes I did some ...
1
vote
1answer
138 views

Is there a tuning parameter for MySQL that allows you to set an on-disk gap between non-sequential primary keys?

I understand that one of the primary issues with using a non-sequential primary key is that every disk/memory write that does not come after the last known key causes a re-write of everything from the ...
2
votes
0answers
551 views

How much disk space needed for 100GB of DBs?

Hard to explain in the title, but I'm planning a migration from SQL Server 2000 databases to SQL Server 2008 R2. The databases are under 100GB total space, but this is only with the Simple recovery ...
1
vote
2answers
456 views

Should a SQL Server TempDB space be allowed to be reclaimed?

If I don't have space concerns at the moment, should I size my TempDB as a large space initially and not let it's space be reclaimed? What's the best way determine what the optimal initial size for ...