> On 18 Feb 2016, at 01:24, Marius Strobl <marius at freebsd.org>
wrote:
>
>
> Could those of you experiencing these hangs with ZFS please test
> whether instead of reverting all of r292895, a kernel built with
> just the merge of r291244 undone via the following patch gets
> rid of that problem - especially on amd64 - and report back?
> https://people.freebsd.org/~marius/r291244_reversal_10.diff
Fist, a warning: as my report is very fuzzy, take it with a grain of salt.
That said, since two months ago more or less, I have been having performance
problems with a ?playground? machine I use for several purposes, like searching
Netflow data, graphing performance data from several machines with Orca, etc.
???
CPU: Six-Core AMD Opteron(tm) Processor 2431 (2400.15-MHz K8-class CPU)
Origin="AuthenticAMD" Id=0x100f80 Family=0x10 Model=0x8
Stepping=0
Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
Features2=0x802009<SSE3,MON,CX16,POPCNT>
AMD
Features=0xee500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM,3DNow!+,3DNow!>
AMD
Features2=0x37ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,SKINIT,WDT>
SVM: NP,NRIP,NAsids=64
TSC: P-state invariant
real memory = 8589934592 (8192 MB)
avail memory = 8270192640 (7887 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <SUN X4x40 >
???
I was running lots of stuff (creating a lot of memory pressure) but the system
coped with it anyway. After one update (I use to track -STABLE) I begun to have
problems. Something I noticed was, the system begun killing processes because of
a lack of memory while the swap partition wasn?t full at all. The wired memory
would skyrocket as well.
After reducing the clutter (ie, removing what I really didn?t need) the server
has been stable, but the performance (for example, when performing large Netflow
searches) has decreased remarkably.
I have rebuilt -STABLE today with that patch, and something has definitely
changed. Performance is much better and memory consumption is not growing like
before, with the same NFsen, Orca and other stuff running.
I know this is not a serious report, I can?t do it with that server, but I hope
it rings a bell or somewhat confirms a data point.
Borja.