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Allow per-tablespace effective_io_concurrency

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Per discussion, nowadays it is possible to have tablespaces that have
wildly different I/O characteristics from others.  Setting different
effective_io_concurrency parameters for those has been measured to
improve performance.

Author: Julien Rouhaud
Reviewed by: Andres Freund
This commit is contained in:
Alvaro Herrera
2015-09-08 12:51:42 -03:00
parent 665a00c9e2
commit 1aba62ec63
12 changed files with 145 additions and 63 deletions
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src/include/commands/tablespace.h
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@@ -39,6 +39,7 @@ typedef struct TableSpaceOpts
int32 vl_len_; /* varlena header (do not touch directly!) */
float8 random_page_cost;
float8 seq_page_cost;
int effective_io_concurrency;
} TableSpaceOpts;
extern Oid CreateTableSpace(CreateTableSpaceStmt *stmt);