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Memory-mapped I/O is now on by default. The "PRAGMA mmap_limit(N)" can be

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used to issue a hint to the VFS to limit mmap space to N bytes.  The VFS
is free to ignore that hint if desired.  However, if "PRAGMA mmap_limit(0)"
is used, xFetch is never called.

FossilOrigin-Name: 1b37c4effdd03aa2ea938a71b4f22ed27391689b
This commit is contained in:
drh
2013-03-25 23:09:28 +00:00
parent d1ab8065c1
commit 0d0614bdc6
18 changed files with 84 additions and 92 deletions
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8
test/incrblob.test
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@ -123,7 +123,7 @@ foreach AutoVacuumMode [list 0 1] {
forcedelete test.db test.db-journal
sqlite3 db test.db
execsql "PRAGMA mmap_size = 0"
execsql "PRAGMA mmap_limit = 0"
execsql "PRAGMA auto_vacuum = $AutoVacuumMode"
do_test incrblob-2.$AutoVacuumMode.1 {
@ -150,7 +150,7 @@ foreach AutoVacuumMode [list 0 1] {
# Open and close the db to make sure the page cache is empty.
db close
sqlite3 db test.db
execsql "PRAGMA mmap_size = 0"
execsql "PRAGMA mmap_limit = 0"
# Read the last 20 bytes of the blob via a blob handle.
set ::blob [db incrblob blobs v 1]
@ -173,7 +173,7 @@ foreach AutoVacuumMode [list 0 1] {
# Open and close the db to make sure the page cache is empty.
db close
sqlite3 db test.db
execsql "PRAGMA mmap_size = 0"
execsql "PRAGMA mmap_limit = 0"
# Write the second-to-last 20 bytes of the blob via a blob handle.
#
@ -203,7 +203,7 @@ foreach AutoVacuumMode [list 0 1] {
# Open and close the db to make sure the page cache is empty.
db close
sqlite3 db test.db
execsql { PRAGMA mmap_size = 0 }
execsql { PRAGMA mmap_limit = 0 }
execsql { SELECT i FROM blobs }
} {45}