Also,

it should not nearly be as frequent, it happens maybe every 30-45 minutes on my 
two relays (one guard, one exit).

Try running Tor natively (you can just move it to a native Linux installation, 
by preserving the "`keys/ed25519_master_id_secret_key`" and 
`"keys/secret_id_key`" in your Tor DataDirectory).

If you run a bridge, also backup and restore the "`pt_state`"  directory into 
your new DataDirectory.

Regards,
George
On Tuesday, January 9th, 2024 at 10:45 PM, George Hartley 
<hartley_geo...@proton.me> wrote:


> Dear Jeff Blum,
> 

> 

> > Yes, I am seeing something similar on 0.4.8.9 (and potentially earlier 
> > versions as well, not 100% sure when it started). I upgraded to 0.4.8.10 
> > today hoping it would go away, but I'm seeing it again. Watching in nyx 
> > (screenshot of bandwidth graph attached), reliably every ~30 seconds.
> 

> 

> This is just Tor doing zlib-compression on some documents, you can somewhat 
> combat it by assigning more cores to your machine.
> 

> Tor is mostly singlethreaded, but OnionSkin decryption, zlib compression and 
> some other operations utilize all cores detected.
> 

> Regards,
> George
> On Monday, January 8th, 2024 at 9:54 AM, Jeff Blum <j...@mulb.us> wrote:
> 

> 

> > 

> > 

> > > On 12/13/23 06:15, Roman Mamedov wrote:
> > > 

> > > > 

> > > > On the older version it gets about 80+80 Mbit total in+out. On the new 
> > > > one the
> > > > average is at most 45+45 Mbit. There are frequent periods where the 
> > > > bandwidth
> > > > drops to 5-10 Mbit for 3-5 seconds, while all Tor processes continue to 
> > > > use
> > > > 100% of both CPUs, then gradually climbs back up.
> > > > 

> > > > Does anyone notice anything similar?
> > 

> > Hi Roman,
> > 

> > Yes, I am seeing something similar on 0.4.8.9 (and potentially earlier 
> > versions as well, not 100% sure when it started). I upgraded to 0.4.8.10 
> > today hoping it would go away, but I'm seeing it again. Watching in nyx 
> > (screenshot of bandwidth graph attached), reliably every ~30 seconds, I see 
> > the bandwidth briefly plummet and the tor process CPU spike. Guard relay 
> > running in docker under ubuntu server on a Ryzen 3600 machine with 32GB 
> > RAM. Note that when the relay restarted after the upgrade today, it didn't 
> > do this for a while (maybe an hour or so? wasn't watching it the whole 
> > time), but then started glitching every 30s. Once it starts it does this 
> > every ~30 seconds forever. Relay has been running like this for weeks, 
> > maybe months.
> > 

> > best,
> > 

> > -jeff
> > 

> > 

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