diff options
Diffstat (limited to 'src/sqliteInt.h')
| -rw-r--r-- | src/sqliteInt.h | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/src/sqliteInt.h b/src/sqliteInt.h index 463cfcefc..1ed789eb7 100644 --- a/src/sqliteInt.h +++ b/src/sqliteInt.h @@ -1305,17 +1305,17 @@ struct Schema { ** outstanding at any point in the past - by subtracting the number of ** allocations on the pInit list from the total number of allocations. ** -** Enhancement on 2019-12-12: Mini-lookaside +** Enhancement on 2019-12-12: Two-size-lookaside ** The default lookaside configuration is 100 slots of 1200 bytes each. ** The larger slot sizes are important for performance, but they waste ** a lot of space, as most lookaside allocations are less than 128 bytes. -** The mini-lookaside enhancement breaks up the lookaside allocation into -** two pools: One of 128-byte slots and the other of the default size -** (1200-byte) slots. Allocations are filled from the mini-pool first, +** The two-size-lookaside enhancement breaks up the lookaside allocation +** into two pools: One of 128-byte slots and the other of the default size +** (1200-byte) slots. Allocations are filled from the small-pool first, ** failing over to the full-size pool if that does not work. Thus more ** lookaside slots are available while also using less memory. ** This enhancement can be omitted by compiling with -** SQLITE_OMIT_MINI_LOOKASIDE. +** SQLITE_OMIT_TWOSIZE_LOOKASIDE. */ struct Lookaside { u32 bDisable; /* Only operate the lookaside when zero */ @@ -1326,12 +1326,12 @@ struct Lookaside { u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */ LookasideSlot *pInit; /* List of buffers not previously used */ LookasideSlot *pFree; /* List of available buffers */ -#ifndef SQLITE_OMIT_MINI_LOOKASIDE - LookasideSlot *pMiniInit; /* List of mini buffers not prediously used */ - LookasideSlot *pMiniFree; /* List of available mini buffers */ +#ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE + LookasideSlot *pSmallInit; /* List of small buffers not prediously used */ + LookasideSlot *pSmallFree; /* List of available small buffers */ void *pMiddle; /* First byte past end of full-size buffers and - ** the first byte of mini-buffers */ -#endif /* SQLITE_OMIT_MINI_LOOKASIDE */ + ** the first byte of LOOKASIDE_SMALL buffers */ +#endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */ void *pStart; /* First byte of available memory space */ void *pEnd; /* First byte past end of available space */ }; @@ -1343,11 +1343,11 @@ struct LookasideSlot { #define EnableLookaside db->lookaside.bDisable--;\ db->lookaside.sz=db->lookaside.bDisable?0:db->lookaside.szTrue -/* Size of the MINI lookside allocation */ -#ifdef SQLITE_OMIT_MINI_LOOKASIDE -# define MINI_SZ 0 +/* Size of the smaller allocations in two-size lookside */ +#ifdef SQLITE_OMIT_TWOSIZE_LOOKASIDE +# define LOOKASIDE_SMALL 0 #else -# define MINI_SZ 128 +# define LOOKASIDE_SMALL 128 #endif /* |