Documentation Source Text

Check-in [c8b280b8eb]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Fix a typo in intern-v-extern-blob.html
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: c8b280b8eb0389b3c888403c50a7a6c937dbe5dd
User & Date: drh 2013-05-01 00:14:55.678
Context
2013-05-01
11:02
Fix typos in queryplanner-ng.html. (check-in: c9e2b500a2 user: drh tags: trunk)
00:14
Fix a typo in intern-v-extern-blob.html (check-in: c8b280b8eb user: drh tags: trunk)
2013-04-30
22:20
Updates to the next-generation-query-planner document. (check-in: 28554e7596 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to pages/intern-v-extern-blob.in.
︙︙
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

If you have a database of large BLOBs, do you get better read performance
when you store the complete
BLOB content directly in the database or is it faster to store each BLOB
in a separate file and store just the corresponding filename in the database?
</p>

<p>
To try answer this, we ran 49 test cases with various BLOB sizes and
SQLite page sizes on a Linux workstation (Ubuntu circa 2011 with the
Ext4 filesystem on a fast SATA disk).
For each test case, a database was created that contains 100MB of BLOB
content.  The sizes of the BLOBs ranged from 10KB to 1MB.  The number
of BLOBs varied in order to keep the total BLOB content at about 100MB.
(Hence, 100 BLOBs for the 1MB size and 10000 BLOBs for the 10K size and
so forth.)  SQLite version 3.7.8 was used.








|








8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

If you have a database of large BLOBs, do you get better read performance
when you store the complete
BLOB content directly in the database or is it faster to store each BLOB
in a separate file and store just the corresponding filename in the database?
</p>

<p>
To try to answer this, we ran 49 test cases with various BLOB sizes and
SQLite page sizes on a Linux workstation (Ubuntu circa 2011 with the
Ext4 filesystem on a fast SATA disk).
For each test case, a database was created that contains 100MB of BLOB
content.  The sizes of the BLOBs ranged from 10KB to 1MB.  The number
of BLOBs varied in order to keep the total BLOB content at about 100MB.
(Hence, 100 BLOBs for the 1MB size and 10000 BLOBs for the 10K size and
so forth.)  SQLite version 3.7.8 was used.
︙︙