diff options
Diffstat (limited to 'src/third_party/wiredtiger/src/docs/upgrading.dox')
| -rw-r--r-- | src/third_party/wiredtiger/src/docs/upgrading.dox | 47 |
1 files changed, 40 insertions, 7 deletions
diff --git a/src/third_party/wiredtiger/src/docs/upgrading.dox b/src/third_party/wiredtiger/src/docs/upgrading.dox index caa6b036892..1e0e2eaf99a 100644 --- a/src/third_party/wiredtiger/src/docs/upgrading.dox +++ b/src/third_party/wiredtiger/src/docs/upgrading.dox @@ -1,7 +1,31 @@ /*! @page upgrading Upgrading WiredTiger applications +@section version_291 Upgrading to Version 2.9.1 +<dl> +<dt>WiredTiger now requires Python 2.7 at minimum</dt> +<dd> +The minimum version of Python supported by WiredTiger is now 2.7 up from the +previous version of 2.6. This is due to extra unit tests added in this release +that depend on 2.7. This is not due to a change in the Python API. +</dd> + +<dt>Changes to hazard pointer configuration</dt> +<dd> +The \c hazard_max parameter to ::wiredtiger_open is now ignored. Memory is +allocated for hazard pointers as required by each session. +</dd> +</dl><hr> -@section version_281 Upgrading to Version 2.8.1 +@section version_290 Upgrading to Version 2.9.0 <dl> +<dt>Changes to cursor behavior after WT_CURSOR::insert</dt> +<dd> +After a successful call to WT_CURSOR::insert, unless a cursor has record +number keys and was configured with "append=true", the cursor's key is +cleared and a subsequent call to the WT_CURSOR::get_key method will fail. +In all cursors, the value is cleared and a subsequent call to +WT_CURSOR::get_value will fail. +</dd> + <dt>Cache management defaults</dt> <dd> The default values for the \c eviction_dirty_target and \c @@ -17,6 +41,15 @@ how much work is done at the beginning of a checkpoint to make the critical section of checkpoints complete more quickly. </dd> +<dt>Change to default fadvise setting for data files</dt> +<dd> +The default behavior for data files was to advise the file system to optimize +for random access on POSIX and Windows platforms. The default is now to not +advise about access patterns. There is a new \c access_pattern_hint +configuration string available to WT_SESSION::create that can be used +to configure the old default behavior. +</dd> + <dt>Checkpoint server created checkpoint names</dt> <dd> The ::wiredtiger_open checkpoint configuration no longer supports the @@ -34,13 +67,13 @@ of the path may no longer be specified. Applications depending on the ability to set statistics log file names will require modification. </dd> -<dt>Deprecated statistics field</dt> +<dt>Removed and renamed statistics fields</dt> <dd> -The connection statistic \c WT_STAT_CONN_CACHE_BYTES_OVERFLOW has been -removed. Overflow information is now available in the -\c WT_STAT_CONN_CACHE_BYTES_OVERFLOW and \c WT_STAT_CONN_CACHE_OVERFLOW_VALUE. -Applications specifically looking for that statistic will require -modification. +WT_STAT_JOIN_ACTUAL_COUNT is renamed to WT_STAT_JOIN_ITERATED + +WT_STAT_CONN_CACHE_BYTES_OVERFLOW removed since overflow pages are not cached + +WT_STAT_CONN_CACHE_EVICTION_SERVER_NOT_EVICTING removed since all eviction threads can now be the server </dd> </dl><hr> |