docs: re-add spaces before units removed

This reverts the spaces before k/M/G/TB units removed for consistency in
commit ca0c37b5.

Discussion: 20160802165116.GC32575@momjian.us

doc/src/sgml/bloom.sgml

@@ -177,7 +177,7 @@ CREATE INDEX
    query.  We could reduce that by specifying a larger signature length.
    In this example, creating the index with <literal>length=200</>
    reduced the number of false positives to 55; but it doubled the index size
-   (to 306MB) and ended up being slower for this query (125 ms overall).
+   (to 306 MB) and ended up being slower for this query (125 ms overall).
   </para>
 
   <para>
@@ -202,7 +202,7 @@ CREATE INDEX
 </programlisting>
    Although this query runs much faster than with either of the single
    indexes, we pay a large penalty in index size.  Each of the single-column
-   btree indexes occupies 214MB, so the total space needed is over 1.2GB,
+   btree indexes occupies 214 MB, so the total space needed is over 1.2GB,
    more than 8 times the space used by the bloom index.
   </para>
  </sect2>

doc/src/sgml/catalogs.sgml

@@ -4021,7 +4021,7 @@
    segments or <quote>pages</> small enough to be conveniently stored as rows
    in <structname>pg_largeobject</structname>.
    The amount of data per page is defined to be <symbol>LOBLKSIZE</> (which is currently
-   <literal>BLCKSZ/4</>, or typically 2kB).
+   <literal>BLCKSZ/4</>, or typically 2 kB).
   </para>
 
   <para>

doc/src/sgml/config.sgml

@@ -2702,7 +2702,7 @@ include_dir 'conf.d'
         checkpoints. This is a soft limit; WAL size can exceed
         <varname>max_wal_size</> under special circumstances, like
         under heavy load, a failing <varname>archive_command</>, or a high
-        <varname>wal_keep_segments</> setting. The default is 1GB.
+        <varname>wal_keep_segments</> setting. The default is 1 GB.
         Increasing this parameter can increase the amount of time needed for
         crash recovery.
         This parameter can only be set in the <filename>postgresql.conf</>
@@ -2723,7 +2723,7 @@ include_dir 'conf.d'
         always recycled for future use at a checkpoint, rather than removed.
         This can be used to ensure that enough WAL space is reserved to
         handle spikes in WAL usage, for example when running large batch
-        jobs. The default is 80MB.
+        jobs. The default is 80 MB.
         This parameter can only be set in the <filename>postgresql.conf</>
         file or on the server command line.
        </para>

doc/src/sgml/datatype.sgml

@@ -1120,7 +1120,7 @@ SELECT '52093.89'::money::numeric::float8;
     the physical requirement on disk might be less. Very long values are also
     stored in background tables so that they do not interfere with rapid
     access to shorter column values. In any case, the longest
-    possible character string that can be stored is about 1GB. (The
+    possible character string that can be stored is about 1 GB. (The
     maximum value that will be allowed for <replaceable>n</> in the data
     type declaration is less than that. It wouldn't be useful to
     change this because with multibyte character encodings the number of

doc/src/sgml/installation.sgml

@@ -326,12 +326,12 @@ su - postgres
 
   <para>
    Also check that you have sufficient disk space. You will need about
-   100MB for the source tree during compilation and about 20MB for
+   100 MB for the source tree during compilation and about 20 MB for
    the installation directory. An empty database cluster takes about
-   35MB; databases take about five times the amount of space that a
+   35 MB; databases take about five times the amount of space that a
    flat text file with the same data would take. If you are going to
    run the regression tests you will temporarily need up to an extra
-   150MB. Use the <command>df</command> command to check free disk
+   150 MB. Use the <command>df</command> command to check free disk
    space.
   </para>
  </sect1>
@@ -2241,7 +2241,7 @@ createlang: language installation failed: ERROR:  could not load library "/opt/d
 createlang: language installation failed: ERROR:  could not load library "/opt/dbs/pgsql748/lib/plperl.so": Bad address
 </screen>
      Another example is out of memory errors in the PostgreSQL server
-     logs, with every memory allocation near or greater than 256MB
+     logs, with every memory allocation near or greater than 256 MB
      failing.
     </para>
 
@@ -2250,8 +2250,8 @@ createlang: language installation failed: ERROR:  could not load library "/opt/d
      and memory model used by the server process.  By default, all
      binaries built on AIX are 32-bit.  This does not depend upon
      hardware type or kernel in use.  These 32-bit processes are
-     limited to 4GB of memory laid out in 256MB segments using one
-     of a few models.  The default allows for less than 256MB in the
+     limited to 4 GB of memory laid out in 256 MB segments using one
+     of a few models.  The default allows for less than 256 MB in the
      heap as it shares a single segment with the stack.
     </para>
 
@@ -2282,7 +2282,7 @@ createlang: language installation failed: ERROR:  could not load library "/opt/d
      settings to find a configuration that works satisfactorily.  This
      use of <symbol>LDR_CNTRL</symbol> tells AIX that you want the
      server to have <symbol>MAXDATA</symbol> bytes set aside for the
-     heap, allocated in 256MB segments.  When you find a workable
+     heap, allocated in 256 MB segments.  When you find a workable
      configuration,
      <command>ldedit</command> can be used to modify the binaries so
      that they default to using the desired heap size.  PostgreSQL can

doc/src/sgml/lobj.sgml

@@ -50,8 +50,8 @@
     larger than a single database page into a secondary storage area per table.
     This makes the large object facility partially obsolete.  One
     remaining advantage of the large object facility is that it allows values
-    up to 4TB in size, whereas <acronym>TOAST</acronym>ed fields can be at
-    most 1GB.  Also, reading and updating portions of a large object can be
+    up to 4 TB in size, whereas <acronym>TOAST</acronym>ed fields can be at
+    most 1 GB.  Also, reading and updating portions of a large object can be
     done efficiently, while most operations on a <acronym>TOAST</acronym>ed
     field will read or write the whole value as a unit.
    </para>

doc/src/sgml/protocol.sgml

@@ -1973,7 +1973,7 @@ The commands accepted in walsender mode are:
           Limit (throttle) the maximum amount of data transferred from server
           to client per unit of time.  The expected unit is kilobytes per second.
           If this option is specified, the value must either be equal to zero
-          or it must fall within the range from 32kB through 1GB (inclusive).
+          or it must fall within the range from 32 kB through 1 GB (inclusive).
           If zero is passed or the option is not specified, no restriction is
           imposed on the transfer.
          </para>

doc/src/sgml/runtime.sgml

@@ -968,7 +968,7 @@ option        SEMMAP=256
       </term>
       <listitem>
        <para>
-        The default maximum segment size is 32MB, and the
+        The default maximum segment size is 32 MB, and the
         default maximum total size is 2097152
         pages.  A page is almost always 4096 bytes except in unusual
         kernel configurations with <quote>huge pages</quote>
@@ -977,7 +977,7 @@ option        SEMMAP=256
 
        <para>
         The shared memory size settings can be changed via the
-        <command>sysctl</command> interface.  For example, to allow 16GB:
+        <command>sysctl</command> interface.  For example, to allow 16 GB:
 <screen>
 <prompt>$</prompt> <userinput>sysctl -w kernel.shmmax=17179869184</userinput>
 <prompt>$</prompt> <userinput>sysctl -w kernel.shmall=4194304</userinput>
@@ -1032,7 +1032,7 @@ kern.sysv.shmall=1024
        </para>
 
        <para>
-        <varname>SHMALL</> is measured in 4kB pages on this platform.
+        <varname>SHMALL</> is measured in 4 kB pages on this platform.
        </para>
 
        <para>
@@ -1075,7 +1075,7 @@ sysctl -w kern.sysv.shmall
       </term>
       <listitem>
        <para>
-        In the default configuration, only 512kB of shared memory per
+        In the default configuration, only 512 kB of shared memory per
         segment is allowed. To increase the setting, first change to the
         directory <filename>/etc/conf/cf.d</>. To display the current value of
         <varname>SHMMAX</>, run:
@@ -1180,7 +1180,7 @@ project.max-msg-ids=(priv,4096,deny)
       <listitem>
        <para>
         On <productname>UnixWare</> 7, the maximum size for shared
-        memory segments is 512kB in the default configuration.
+        memory segments is 512 kB in the default configuration.
         To display the current value of <varname>SHMMAX</>, run:
 <programlisting>
 /etc/conf/bin/idtune -g SHMMAX

doc/src/sgml/storage.sgml

@@ -217,11 +217,11 @@ function.
 </caution>
 
 <para>
-When a table or index exceeds 1GB, it is divided into gigabyte-sized
+When a table or index exceeds 1 GB, it is divided into gigabyte-sized
 <firstterm>segments</>.  The first segment's file name is the same as the
 filenode; subsequent segments are named filenode.1, filenode.2, etc.
 This arrangement avoids problems on platforms that have file size limitations.
-(Actually, 1GB is just the default segment size.  The segment size can be
+(Actually, 1 GB is just the default segment size.  The segment size can be
 adjusted using the configuration option <option>--with-segsize</option>
 when building <productname>PostgreSQL</>.)
 In principle, free space map and visibility map forks could require multiple
@@ -303,7 +303,7 @@ Oversized-Attribute Storage Technique).
 
 <para>
 <productname>PostgreSQL</productname> uses a fixed page size (commonly
-8kB), and does not allow tuples to span multiple pages.  Therefore, it is
+8 kB), and does not allow tuples to span multiple pages.  Therefore, it is
 not possible to store very large field values directly.  To overcome
 this limitation, large field values are compressed and/or broken up into
 multiple physical rows.  This happens transparently to the user, with only
@@ -336,7 +336,7 @@ See <xref linkend="xtypes-toast"> for more detail.)
 <acronym>TOAST</> usurps two bits of the varlena length word (the high-order
 bits on big-endian machines, the low-order bits on little-endian machines),
 thereby limiting the logical size of any value of a <acronym>TOAST</>-able
-data type to 1GB (2<superscript>30</> - 1 bytes).  When both bits are zero,
+data type to 1 GB (2<superscript>30</> - 1 bytes).  When both bits are zero,
 the value is an ordinary un-<acronym>TOAST</>ed value of the data type, and
 the remaining bits of the length word give the total datum size (including
 length word) in bytes.  When the highest-order or lowest-order bit is set,
@@ -344,7 +344,7 @@ the value has only a single-byte header instead of the normal four-byte
 header, and the remaining bits of that byte give the total datum size
 (including length byte) in bytes.  This alternative supports space-efficient
 storage of values shorter than 127 bytes, while still allowing the data type
-to grow to 1GB at need.  Values with single-byte headers aren't aligned on
+to grow to 1 GB at need.  Values with single-byte headers aren't aligned on
 any particular boundary, whereas values with four-byte headers are aligned on
 at least a four-byte boundary; this omission of alignment padding provides
 additional space savings that is significant compared to short values.
@@ -420,10 +420,10 @@ bytes regardless of the actual size of the represented value.
 <para>
 The <acronym>TOAST</> management code is triggered only
 when a row value to be stored in a table is wider than
-<symbol>TOAST_TUPLE_THRESHOLD</> bytes (normally 2kB).
+<symbol>TOAST_TUPLE_THRESHOLD</> bytes (normally 2 kB).
 The <acronym>TOAST</> code will compress and/or move
 field values out-of-line until the row value is shorter than
-<symbol>TOAST_TUPLE_TARGET</> bytes (also normally 2kB)
+<symbol>TOAST_TUPLE_TARGET</> bytes (also normally 2 kB)
 or no more gains can be had.  During an UPDATE
 operation, values of unchanged fields are normally preserved as-is; so an
 UPDATE of a row with out-of-line values incurs no <acronym>TOAST</> costs if
@@ -491,7 +491,7 @@ containing typical HTML pages and their URLs was stored in about half of the
 raw data size including the <acronym>TOAST</> table, and that the main table
 contained only about 10% of the entire data (the URLs and some small HTML
 pages). There was no run time difference compared to an un-<acronym>TOAST</>ed
-comparison table, in which all the HTML pages were cut down to 7kB to fit.
+comparison table, in which all the HTML pages were cut down to 7 kB to fit.
 </para>
 
 </sect2>
@@ -512,7 +512,7 @@ pointers to <firstterm>expanded</> data.
 Indirect <acronym>TOAST</> pointers simply point at a non-indirect varlena
 value stored somewhere in memory.  This case was originally created merely
 as a proof of concept, but it is currently used during logical decoding to
-avoid possibly having to create physical tuples exceeding 1GB (as pulling
+avoid possibly having to create physical tuples exceeding 1 GB (as pulling
 all out-of-line field values into the tuple might do).  The case is of
 limited use since the creator of the pointer datum is entirely responsible
 that the referenced data survives for as long as the pointer could exist,
@@ -703,7 +703,7 @@ an item is a row; in an index, an item is an index entry.
 
 <para>
 Every table and index is stored as an array of <firstterm>pages</> of a
-fixed size (usually 8kB, although a different page size can be selected
+fixed size (usually 8 kB, although a different page size can be selected
 when compiling the server).  In a table, all the pages are logically
 equivalent, so a particular item (row) can be stored in any page.  In
 indexes, the first page is generally reserved as a <firstterm>metapage</>

doc/src/sgml/wal.sgml

@@ -475,7 +475,7 @@
    linkend="guc-checkpoint-timeout"> seconds, or if
    <xref linkend="guc-max-wal-size"> is about to be exceeded,
    whichever comes first.
-   The default settings are 5 minutes and 1GB, respectively.
+   The default settings are 5 minutes and 1 GB, respectively.
    If no WAL has been written since the previous checkpoint, new checkpoints
    will be skipped even if <varname>checkpoint_timeout</> has passed.
    (If WAL archiving is being used and you want to put a lower limit on how
@@ -735,10 +735,10 @@
   <para>
    <acronym>WAL</acronym> logs are stored in the directory
    <filename>pg_xlog</filename> under the data directory, as a set of
-   segment files, normally each 16MB in size (but the size can be changed
+   segment files, normally each 16 MB in size (but the size can be changed
    by altering the <option>--with-wal-segsize</> configure option when
    building the server).  Each segment is divided into pages, normally
-   8kB each (this size can be changed via the <option>--with-wal-blocksize</>
+   8 kB each (this size can be changed via the <option>--with-wal-blocksize</>
    configure option).  The log record headers are described in
    <filename>access/xlogrecord.h</filename>; the record content is dependent
    on the type of event that is being logged.  Segment files are given