On Fri, Oct 22, 2021 at 10:36:55PM +0300, Mikhail wrote: > On Sat, Oct 16, 2021 at 03:13:39PM +0300, Mikhail wrote: > > Hello, I was troubleshooting postgresql not being able to start after > > 'pkill -6 postgres'. The error was: > > > > FATAL: could not create semaphores: No space left on device > > DETAIL: Failed system call was semget(78927, 17, 03600). > > HINT: This error does *not* mean that you have run out of disk space. It > > occurs when either the system limit for the maximum number of semaphore > > sets (SEMMNI), or the system wide maximum number of semaphores (SEMMNS), > > would be exceeded. You need to raise the respective kernel parameter. > > Alternatively, reduce PostgreSQL's consumption of semaphores by reducing > > its max_connections parameter. The PostgreSQL documentation contains > > more information about configuring your system for PostgreSQL. > > > > It would have saved me about half a day, if ipcs(1) was mentioned on > > semget(2) man page, web is very short of information about SysV > > semaphore management. > > > > I thought about adding ipcrm(1) ref too, but decided that it's already > > mentioned on ipcs(1) man page and it would be nice to keep things short, > > but I can redo the patch, if it will be found useful at all. > > It turns out that shmat(2) and shmdt(2) man page already mentions > ipcrm(1) and ipcs(1), but it's not mentioned on shmctl(2) and sem* > functions - inlined patch makes things even. > > mandoc -T lint is passed. > > Comments, OKs? >
i think this is fine. are you asking for an ok because you are a developer? if not i'll commit it unless i hear anyone object. jmc > diff --git lib/libc/sys/semctl.2 lib/libc/sys/semctl.2 > index b76b9812692..811270269b8 100644 > --- lib/libc/sys/semctl.2 > +++ lib/libc/sys/semctl.2 > @@ -235,5 +235,7 @@ or the values in > are greater than the system-imposed limit. > .El > .Sh SEE ALSO > +.Xr ipcrm 1 , > +.Xr ipcs 1 , > .Xr semget 2 , > .Xr semop 2 > diff --git lib/libc/sys/semget.2 lib/libc/sys/semget.2 > index 7627e49549a..e06023d16f7 100644 > --- lib/libc/sys/semget.2 > +++ lib/libc/sys/semget.2 > @@ -147,6 +147,8 @@ and no semaphore set associated with > was found. > .El > .Sh SEE ALSO > +.Xr ipcrm 1 , > +.Xr ipcs 1 , > .Xr semctl 2 , > .Xr semop 2 , > .Xr ftok 3 > diff --git lib/libc/sys/semop.2 lib/libc/sys/semop.2 > index 691cb5b1b95..6b023207664 100644 > --- lib/libc/sys/semop.2 > +++ lib/libc/sys/semop.2 > @@ -152,5 +152,7 @@ was set in > points to an illegal address. > .El > .Sh SEE ALSO > +.Xr ipcrm 1 , > +.Xr ipcs 1 , > .Xr semctl 2 , > .Xr semget 2 > diff --git lib/libc/sys/shmctl.2 lib/libc/sys/shmctl.2 > index 801c7cecbda..a272d1f482d 100644 > --- lib/libc/sys/shmctl.2 > +++ lib/libc/sys/shmctl.2 > @@ -185,6 +185,8 @@ is not a valid command. > specifies an invalid address. > .El > .Sh SEE ALSO > +.Xr ipcrm 1 , > +.Xr ipcs 1 , > .Xr shmat 2 , > .Xr shmget 2 > .Sh STANDARDS >
