greenplumn spccache 代码
文件路径：/src/include/utils/spccache.h
/*-------------------------------------------------------------------------
*
* spccache.h
* Tablespace cache.
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/utils/spccache.h
*
*-------------------------------------------------------------------------
*/
#ifndef SPCCACHE_H
#define SPCCACHE_H
void get_tablespace_page_costs(Oid spcid, float8 *spc_random_page_cost,
float8 *spc_seq_page_cost);
int get_tablespace_io_concurrency(Oid spcid);
#endif /* SPCCACHE_H */