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Add the SQLITE_DBSTATUS_CACHE_USED_SHARED sqlite3_db_status() parameter. This option is similar to DBSTATUS_CACHE_USED, except that it divides memory used by shared caches evenly between all connections.

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FossilOrigin-Name: 06cf2680588c8dc4f0cbde275a09cfdcb5943268
This commit is contained in:
dan
2016-07-06 18:42:34 +00:00
parent dc7b7385c9 9c10608a26
commit c8dcdff37e
8 changed files with 86 additions and 16 deletions
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test/dbstatus.test
+37
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@@ -14,6 +14,7 @@
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix dbstatus
ifcapable !compound {
finish_test
@@ -24,6 +25,7 @@ ifcapable !compound {
db close
sqlite3_shutdown
sqlite3_config_memstatus 1
sqlite3_config_uri 1
sqlite3_initialize
sqlite3 db test.db
@@ -377,4 +379,39 @@ foreach ::lookaside_buffer_size {0 64 120} {
}
}
#-------------------------------------------------------------------------
# The following tests focus on DBSTATUS_CACHE_USED_SHARED
#
ifcapable shared_cache {
proc do_cacheused_test {tn db res} {
set cu [sqlite3_db_status $db SQLITE_DBSTATUS_CACHE_USED 0]
set pcu [sqlite3_db_status $db SQLITE_DBSTATUS_CACHE_USED_SHARED 0]
set cu [lindex $cu 1]
set pcu [lindex $pcu 1]
uplevel [list do_test $tn [list list $cu $pcu] [list {*}$res]]
}
reset_db
sqlite3 db file:test.db?cache=shared
do_execsql_test 4.0 {
CREATE TABLE t1(a, b, c);
INSERT INTO t1 VALUES(1, 2, 3);
}
do_cacheused_test 4.0.1 db { 4568 4568 }
do_execsql_test 4.1 {
CREATE TEMP TABLE tt(a, b, c);
INSERT INTO tt VALUES(1, 2, 3);
}
do_cacheused_test 4.1.1 db { 9000 9000 }
sqlite3 db2 file:test.db?cache=shared
do_cacheused_test 4.2.1 db2 { 4568 2284 }
do_cacheused_test 4.2.2 db { 9000 6716 }
db close
do_cacheused_test 4.2.3 db2 { 4568 4568 }
sqlite3 db file:test.db?cache=shared
do_cacheused_test 4.2.4 db2 { 4568 2284 }
db2 close
}
finish_test