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| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2015-09-08 12:51:42 -0300 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2015-09-08 12:51:42 -0300 |
| commit | 1aba62ec635f5852bc45ce65482366e541e61ff5 (patch) | |
| tree | 1161cc00324cb8d229b831a944432646ae1552d5 /src/include/nodes/execnodes.h | |
| parent | 665a00c9e2598e3be366cb9f99c0a04a51dd8c7a (diff) | |
Allow per-tablespace effective_io_concurrency
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
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 5796de861c4..4ae2f3e067b 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -1424,7 +1424,8 @@ typedef struct BitmapIndexScanState * lossy_pages total number of lossy pages retrieved * prefetch_iterator iterator for prefetching ahead of current page * prefetch_pages # pages prefetch iterator is ahead of current - * prefetch_target target prefetch distance + * prefetch_target current target prefetch distance + * prefetch_maximum maximum value for prefetch_target * ---------------- */ typedef struct BitmapHeapScanState @@ -1439,6 +1440,7 @@ typedef struct BitmapHeapScanState TBMIterator *prefetch_iterator; int prefetch_pages; int prefetch_target; + int prefetch_maximum; } BitmapHeapScanState; /* ---------------- |