diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
new file mode 100644
index 5098aad..68ceff1
*** a/doc/src/sgml/runtime.sgml
--- b/doc/src/sgml/runtime.sgml
*************** psql: could not connect to server: No su
*** 604,616 ****
         <row>
          <entry><varname>SEMMNI</></>
          <entry>Maximum number of semaphore identifiers (i.e., sets)</>
!         <entry>at least <literal>ceil((max_connections + autovacuum_max_workers) / 16)</literal></>
         </row>
  
         <row>
          <entry><varname>SEMMNS</></>
          <entry>Maximum number of semaphores system-wide</>
!         <entry><literal>ceil((max_connections + autovacuum_max_workers) / 16) * 17</literal> plus room for other applications</>
         </row>
  
         <row>
--- 604,616 ----
         <row>
          <entry><varname>SEMMNI</></>
          <entry>Maximum number of semaphore identifiers (i.e., sets)</>
!         <entry>at least <literal>ceil((max_connections + autovacuum_max_workers + 4) / 16)</literal></>
         </row>
  
         <row>
          <entry><varname>SEMMNS</></>
          <entry>Maximum number of semaphores system-wide</>
!         <entry><literal>ceil((max_connections + autovacuum_max_workers + 4) / 16) * 17</literal> plus room for other applications</>
         </row>
  
         <row>
*************** psql: could not connect to server: No su
*** 685,691 ****
      linkend="sysvipc-parameters">).  The parameter <varname>SEMMNI</>
      determines the limit on the number of semaphore sets that can
      exist on the system at one time.  Hence this parameter must be at
!     least <literal>ceil((max_connections + autovacuum_max_workers) / 16)</>.
      Lowering the number
      of allowed connections is a temporary workaround for failures,
      which are usually confusingly worded <quote>No space
--- 685,691 ----
      linkend="sysvipc-parameters">).  The parameter <varname>SEMMNI</>
      determines the limit on the number of semaphore sets that can
      exist on the system at one time.  Hence this parameter must be at
!     least <literal>ceil((max_connections + autovacuum_max_workers + 4) / 16)</>.
      Lowering the number
      of allowed connections is a temporary workaround for failures,
      which are usually confusingly worded <quote>No space