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| author | drh <drh@noemail.net> | 2019-12-13 16:04:52 +0000 |
|---|---|---|
| committer | drh <drh@noemail.net> | 2019-12-13 16:04:52 +0000 |
| commit | d335bc40a6576d8759466d8efaaaf82b04667aaa (patch) | |
| tree | 0b386ac43403c67d9b04dcbd86afe9e62ece0edb /src/global.c | |
| parent | e6068027ca584a1263d2d659f48eded07fc4a297 (diff) | |
| download | sqlite-d335bc40a6576d8759466d8efaaaf82b04667aaa.tar.gz sqlite-d335bc40a6576d8759466d8efaaaf82b04667aaa.zip | |
Change the default lookaside configuration to 40 slots of 1200-bytes each.
This actually works out to 30 big slots and 93 small slots using the
mini-lookaside allocator. We get the same (or better) lookaside coverage
but with 72KB less memory per connection.
FossilOrigin-Name: 47b71a84d1262c4bf6ad4f4a91820fd63593f08ae9efa144199d44972225e073
Diffstat (limited to 'src/global.c')
| -rw-r--r-- | src/global.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/global.c b/src/global.c index 4689e94bb..570002be4 100644 --- a/src/global.c +++ b/src/global.c @@ -190,9 +190,18 @@ const unsigned char sqlite3CtypeMap[256] = { ** changed as start-time using sqlite3_config(SQLITE_CONFIG_LOOKASIDE) ** or at run-time for an individual database connection using ** sqlite3_db_config(db, SQLITE_DBCONFIG_LOOKASIDE); +** +** With the mini-lookaside enhancement, must less lookaside is required. +** The default configuration of 1200,40 actually proves 30 1200-byte slots +** and 93 128-byte slots, which is more lookaside slots that are available +** using the older 1200,100 configuration without mini-lookaside. */ #ifndef SQLITE_DEFAULT_LOOKASIDE -# define SQLITE_DEFAULT_LOOKASIDE 1200,100 +# ifdef SQLITE_OMIT_MINI_LOOKASIDE +# define SQLITE_DEFAULT_LOOKASIDE 1200,100 /* 120KB of memory */ +# else +# define SQLITE_DEFAULT_LOOKASIDE 1200,40 /* 48KB of memory */ +# endif #endif |