[39/46] incubator-quickstep git commit: Leave 10% more memory for the OS. (#218)

[zu...@apache.org]

Leave 10% more memory for the OS. (#218)

Project: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/commit/aaec472a
Tree: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/tree/aaec472a
Diff: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/diff/aaec472a

Branch: refs/heads/master
Commit: aaec472af1be2dcd58e4a925114e295a0e93ff31
Parents: e90f6f2
Author: Jignesh Patel <pa...@users.noreply.github.com>
Authored: Sun May 8 22:41:17 2016 -0500
Committer: Zuyu ZHANG <zu...@users.noreply.github.com>
Committed: Sun May 8 20:41:17 2016 -0700

----------------------------------------------------------------------
 storage/StorageConstants.hpp | 4 ++--
 storage/StorageManager.cpp   | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/aaec472a/storage/StorageConstants.hpp
----------------------------------------------------------------------
diff --git a/storage/StorageConstants.hpp b/storage/StorageConstants.hpp
index 154d2f7..0609cba 100644
--- a/storage/StorageConstants.hpp
+++ b/storage/StorageConstants.hpp
@@ -58,8 +58,8 @@ const std::uint64_t kLargeMemorySystemThresholdInGB = 32;
 // we grab a bigger fraction of the installed memory than for a "small" system.
 // The two constants below define the percentages to grab in each case.
 // TODO(jmp): May need to generalize this to more than two levels in the future.
-const std::uint64_t kPercentageToGrabForSmallSystems = 80;
-const std::uint64_t kPercentageToGrabForLargeSystems = 90;
+const std::uint64_t kPercentageToGrabForSmallSystems = 70;
+const std::uint64_t kPercentageToGrabForLargeSystems = 80;
 
 // The default size of the buffer pool (in terms of the number of slots).
 const std::uint64_t kDefaultBufferPoolSizeInSlots = 1024;

http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/aaec472a/storage/StorageManager.cpp
----------------------------------------------------------------------
diff --git a/storage/StorageManager.cpp b/storage/StorageManager.cpp
index b990a22..dfc95b8 100644
--- a/storage/StorageManager.cpp
+++ b/storage/StorageManager.cpp
@@ -100,8 +100,8 @@ static const volatile bool block_domain_dummy
 /**
  * @brief Set or validate the buffer pool slots. When automatically picking a
  *        default value, check if the system is "small" or "large." Set the
- *        buffer pool space to 80% of the installed main memory for small
- *        and 90% otherwise.
+ *        buffer pool space to 70% of the installed main memory for small
+ *        and 80% otherwise.
  *        This method follows the signature that is set by the gflags module.
  * @param flagname The name of the buffer pool flag.
  * @param value The value of this flag from the command line, or default (0)
@@ -142,7 +142,7 @@ static bool SetOrValidateBufferPoolSlots(const char *flagname,
 
 DEFINE_uint64(buffer_pool_slots, 0,
               "By default the value is 0 and the system automatically sets the "
-              "buffer pool size/slots at 80-90% of the total installed memory. "
+              "buffer pool size/slots at 70-80% of the total installed memory. "
               "The user can also explicity define the number of slots. "
               "The units for this variable is the number of 2-megabyte slots "
               "that is allocated in the buffer pool. This is a \"soft\" limit: "