Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-14 Thread Andres Freund
On 2016-04-14 12:05:39 +0200, Bernd Helmle wrote: > > > --On 12. April 2016 13:20:10 -0700 Andres Freund wrote: > > >> When working with huge_pages, we initially got this error. > >> > >> munmap(0x3efbe400) failed: Invalid argument > > > > *munmap*, not mmap failed?

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-14 Thread Bert
hmpf; are you sure? I just checked on our own rhel7 system, and RemoveIPC is set to 'no' by default.. On Tue, Apr 12, 2016 at 10:26 PM, Tom Lane wrote: > Andres Freund writes: > > On 2016-04-12 21:58:14 +0200, reiner peterke wrote: > >> Looking for some

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-14 Thread Bernd Helmle
--On 12. April 2016 13:20:10 -0700 Andres Freund wrote: >> When working with huge_pages, we initially got this error. >> >> munmap(0x3efbe400) failed: Invalid argument > > *munmap*, not mmap failed? that's odd; because there the hugepagesize > shouldn't have much of

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-13 Thread reiner peterke
> On Apr 12, 2016, at 10:26 PM, Tom Lane wrote: > > Andres Freund writes: >> On 2016-04-12 21:58:14 +0200, reiner peterke wrote: >>> Looking for some insight into this issue. the error from the postgres >>> log on ubuntu is below. It apperas to be

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-12 Thread Tom Lane
reiner peterke writes: >> On Apr 12, 2016, at 10:20 PM, Andres Freund wrote: >> I've a bit of a hard time believing that this is related to huge pages. > Well all i have at the moment is that when we disabled huge pages on the > kernel level and then

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-12 Thread reiner peterke
> On Apr 12, 2016, at 10:20 PM, Andres Freund wrote: > > On 2016-04-12 21:58:14 +0200, reiner peterke wrote: >> Hi >> >> We have been doing some testing with Postgres (9.5.2) compiled on a Power8 >> running Centos 7 >> >> When working with huge_pages, we initially got

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-12 Thread Tom Lane
Andres Freund writes: > On 2016-04-12 21:58:14 +0200, reiner peterke wrote: >> Looking for some insight into this issue. the error from the postgres >> log on ubuntu is below. It apperas to be related to semephores. > I've a bit of a hard time believing that this is related

Re: [HACKERS] Problems with huge_pages and IBM Power8

2016-04-12 Thread Andres Freund
On 2016-04-12 21:58:14 +0200, reiner peterke wrote: > Hi > > We have been doing some testing with Postgres (9.5.2) compiled on a Power8 > running Centos 7 > > When working with huge_pages, we initially got this error. > > munmap(0x3efbe400) failed: Invalid argument *munmap*, not mmap