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cleanup: Make tempfile creation uniform with DISK_CHUNK_SIZE

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Replace READ_RECORD_SIZE and DISK_BUFFER_SIZE (renamed to
DISK_CHUNK_SIZE) to be used across all open_cached_file calls.

Reviewer: Monty
This commit is contained in:
Vicențiu Ciorbaru
2022-06-30 13:46:43 +03:00
committed by Sergei Petrunia
parent fa90ac6180
commit ca2851d17e
5 changed files with 18 additions and 19 deletions
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11
sql/sql_const.h
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@@ -119,14 +119,13 @@
#define CREATE_MODE 0 /* Default mode on new files */
#define NAMES_SEP_CHAR 255 /* Char to sep. names */
#define READ_RECORD_BUFFER (uint) (IO_SIZE*8) /* Pointer_buffer_size */
#define DISK_BUFFER_SIZE (uint) (IO_SIZE*16) /* Size of diskbuffer */
/*
When reading big blocks, assume that each block of this size is
is of simlar cost as key lookup (1)
This is used when reading large blocks, sequential read.
We assume that reading this much will be the same cost as 1 seek / fetching
one row from the storage engine.
*/
#define DISK_FAST_READ_SIZE ((uint) (IO_SIZE*16))
#define DISK_CHUNK_SIZE (uint) (65536) /* Size of diskbuffer for tmpfiles */
#define TMPFILE_CREATE_COST 2.0 /* Creating and deleting tmp file */
#define FRM_VER_TRUE_VARCHAR (FRM_VER+4) /* 10 */
#define FRM_VER_EXPRESSSIONS (FRM_VER+5) /* 11 */