Re: Performance issues - huge amount of AVC misses

[Stephen Smalley <sds@tycho.nsa.gov>]

On 12/09/2015 08:15 AM, Michal Marciniszyn wrote:
> Hi,
>
> after increasing the cache, I do not see many reclaims, like couple of
> them here and there. The cache size had to be increased to 2048 to get
> ti this state.
>
> # avcstat 15
>
>      537645     537623         22         22         32         32
>      942916     942912          4          4          0          0
>      604466     604457          9          9          0          0
>      451737     451730          7          7         16         16
>      457669     457669          0          0          0          0
>      519135     519133          2          2          0          0
>      517288     517288          0          0          0          0
>      380376     380376          0          0          0          0
>      464272     464269          3          3          0          0
>      531484     531482          2          2          0          0
>     1422422    1422421          1          1          0          0
>     1380932    1380932          0          0          0          0
>      512999     512999          0          0          0          0
>
>
> Is it ok if I get longest chain length 13 in hash stats (It was higher
> in the beginning - 19, but got to 13 after 2 hours)?

I wouldn't worry about that; it's insignificant compared to the cost of 
an AVC miss.