The tag has no wiki summary.

learn more… | top users | synonyms

2
votes
0answers
39 views

work/cache table issues, heavy inserts with heavy reads

we have a work table that stores availability of products. This table is updated with millions of inserts every night and medium amounts of inserts throughout the day. during the updates, we delete ...
2
votes
2answers
107 views

fragmentation for non cluster index growth very fast to 30

i have table with about 7 milion records.index fragmentation was about 90 . i try rebuild index for all index. and it works fine but after nightly job fragmentation for one of none cluster index ...
3
votes
1answer
153 views

PostgreSQL: When should I use fillfactor < 100 for tables on SSD?

PostgreSQL documentation says that choosing smaller fillfactor lets table reserve space for future updates on the same page and "This gives UPDATE a chance to place the updated copy of a row on ...
0
votes
0answers
49 views

Is there a quantitative method to follow to determine FILLFACTOR for NONCLUSTERED INDEXes?

I've read different ideas to set FILLFACTOR and then monitor fragmentation over time (#1: 5 Things About Fillfactor, #2: Database Maintenance Best Practices Part II – Setting FILLFACTOR). Instead of ...
1
vote
2answers
120 views

Fill Factor Setting and Performance

From what I've read, typically for indexing the recommendation is to leave the fill factor at 70-80, and the logic behind this seems that new data may be inserted into a table between existing values ...
3
votes
1answer
111 views

Fill factor based on index ranges

I'm designing a Postgres database for an events app. The app lists events sorted by when they start. Initially the app displays only 30 events. As users scroll through the list of events, more ...
4
votes
1answer
223 views

How can I alter the fill factor of an index outside of an ALTER INDEX command?

I am using a COTS package to perform index rebuilds across my SQL Server portfolio. The package unfortunately doesn't have an option to set index fill factors globally for an individual instance or DB ...
5
votes
1answer
431 views

What fillfactor for caching table?

I have heavily updated / accessed table where I store serialized java objects. They are in the table for 2-3 hours (also are being updated during that period) and then removed. Size of table is around ...
0
votes
1answer
260 views

Fill factor for later bigserial + index

I'm planning to import and update a huge table (3 Bil. rows) in the following step: create table with fill factor x import the data from csv files (6 files, ~21GB each) add a BIGSERIAL column create ...
1
vote
1answer
324 views

Will a composite Primary Key use the 15/16 page fill factor or the 1/2?

I understand that if a PK is a consecutive number, it will fill a page as its maximum which is a factor of 15/16. If it is a random PK the page fill factor will be of 1/2. I was wondering if my PK ...
3
votes
1answer
1k views

How can I set the index fill factor back to server default?

I have some indexes that I was playing with on my dev server. I set the fill factor of these indexes using the following command: alter index all on dbo.Table rebuild with (fillfactor=80) That ...
8
votes
1answer
708 views

Why does the fill factor in SQL Server default to 0 (100%)?

I understand fill-factor, pages and index structure and I therefor understand why a 100% fill factor is a rare best practice. So why does it default to 0 (or 100% ) by default? Why not 90 or 95? Is ...
3
votes
2answers
191 views

What is the signifigance of a fillfactor of 20?

I have a database for our ticket system in SQL Server express. I was poking around and noticed that a lot of the indexes have a fillfactor set to 20. What is the signifigance of it being set to 20? ...
10
votes
1answer
557 views

Behavior of data in indexes based on fill factor

Let's say you have a database where the default fill factor is 20. Whenever data is inserted, does it only create pages filled up to 20%? From my understanding, when the data is inserted there ...