|
- min_recovery_end_location
+ min_recovery_end_location
pg_lsn
|
- min_recovery_end_timeline
+ min_recovery_end_timeline
integer
|
- backup_start_location
+ backup_start_location
pg_lsn
|
- backup_end_location
+ backup_end_location
pg_lsn
|
- end_of_backup_record_required
+ end_of_backup_record_required
boolean
servers. Waiting for confirmation increases the user's confidence that the
changes will not be lost in the event of server crashes but it also
necessarily increases the response time for the requesting transaction.
- The minimum wait time is the roundtrip time between primary to standby.
+ The minimum wait time is the round-trip time between primary to standby.
But there's a problem: the WHERE clause refers
to success which is not available as a result column of the
index. Nonetheless, an index-only scan is possible because the plan does
- not need to recheck that part of the WHERE clause at runtime:
+ not need to recheck that part of the WHERE clause at run time:
all entries found in the index necessarily have success = true
so this need not be explicitly checked in the
plan.
PostgreSQL versions 9.6 and later will recognize
In verify-full mode, the host name is matched against the
certificate's Subject Alternative Name attribute(s), or against the
- Common Name attribute if no Subject Alternative Name of type dNSName is
+ Common Name attribute if no Subject Alternative Name of type dNSName is
present. If the certificate's name attribute starts with an asterisk
(*), the asterisk will be treated as
a wildcard, which will match all characters except a dot
All
SSL options carry overhead in the form of encryption and- key-exchange, so there is a tradeoff that has to be made between performance
+ key-exchange, so there is a trade-off that has to be made between performance
and security.
illustrates the risks the different sslmode values
protect against, and what statement they make about security and overhead.
|
BtreeVacuumLock
Waiting to read or update vacuum-related information for a
- Btree index.
+ B-tree index.
|
AddinShmemInitLock
- Add the specified builtin script to the list of executed scripts.
+ Add the specified built-in script to the list of executed scripts.
An optional integer weight after @ allows to adjust the
probability of drawing the script. If not specified, it is set to 1.
- Available builtin scripts are: tpcb-like,
+ Available built-in scripts are: tpcb-like,
simple-update and select-only.
- Unambiguous prefixes of builtin names are accepted.
- With special name list, show the list of builtin scripts
+ Unambiguous prefixes of built-in names are accepted.
+ With special name list, show the list of built-in scripts
and exit immediately.
- Run builtin simple-update script.
+ Run built-in simple-update script.
Shorthand for
- The default builtin transaction script (also invoked with
+ The default built-in transaction script (also invoked with
issues seven commands per transaction over randomly chosen aid,
tid, bid and balance.
The scenario is inspired by the TPC-B benchmark, but is not actually TPC-B,
- If you select the simple-update builtin (also
+ If you select the simple-update built-in (also
steps 4 and 5 aren't included in the transaction.
This will avoid update contention on these tables, but
it makes the test case even less like TPC-B.
- If you select the select-only builtin (also
+ If you select the select-only built-in (also
only the SELECT is issued.
|
random_gaussian(lb, ub, parameter)
integer
- gaussian-distributed random integer in [lb, ub],
+ Gaussian-distributed random integer in [lb, ub],
see below
random_gaussian(1, 10, 2.5)
an integer between 1 and 10
When suitable, query results can be shown in a crosstab representation
- with the \crosstabview command:
+ with the \crosstabview command:
testdb=> SELECT first, second, first > 2 AS gt2 FROM my_table;
first | second | ge2
with ROWS FROM( ... ). The output of such an item is the
concatenation of the first row from each function, then the second
row from each function, etc. If some of the functions produce fewer
- rows than others, NULLs are substituted for the missing data, so
+ rows than others, null values are substituted for the missing data, so
that the total number of rows returned is always the same as for the
function that produced the most rows.
output list are executed in the order suggested by ORDER
BY, and that they are not evaluated more times than required when
there's a LIMIT. Previously, these properties held if
- the ordering was performed by an indexscan or pre-mergejoin sort,
+ the ordering was performed by an index scan or pre-merge-join sort,
but not if it was performed by a top-level sort step.
2016-01-26 [cc988fbb0] Improve ResourceOwners' behavior for large numbers of ow
-->
- Improve performance of ResourceOwners with many tracked objects
+ Improve performance of resource owners with many tracked objects
(Aleksander Alekseev)
Barring special arrangements code in signal handlers may only
- call async-signal safe functions (as defined in posix) and access
+ call async-signal safe functions (as defined in POSIX) and access
variables of type volatile sig_atomic_t. A few
- functions in postgres are also deemed signal safe, importantly
- <literal>SetLatch()>.
+ functions in postgres are also deemed signal safe, importantly
+ <function>SetLatch()>.
In most cases signal handlers should do nothing more than note
errno = save_errno;
}
- <literal>errno is safed and restored because
- <literal>SetLatch() might change it. If that were not done
- interrupted code that's currently inspecting errno might see the wrong
+ <varname>errno is saved and restored because
+ <function>SetLatch() might change it. If that were not done
+ interrupted code that's currently inspecting errno might see the wrong
value.
to extract .aff and .dic files, change
extensions to .affix and .dict. For some
dictionary files it is also needed to convert characters to the UTF-8
- encoding with commands (for example, for norwegian language dictionary):
+ encoding with commands (for example, for a Norwegian language dictionary):
iconv -f ISO_8859-1 -t UTF-8 -o nn_no.affix nn_NO.aff
iconv -f ISO_8859-1 -t UTF-8 -o nn_no.dict nn_NO.dic
projects / postgresql.git / commitdiff