Author Topic: lscache.dat constantly writing since update to 18.2.3827.307  (Read 4612 times)

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Offline nigeltufnelny

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lscache.dat constantly writing since update to 18.2.3827.307
« on: March 29, 2018, 03:51:17 PM »
I have 4 Windows 10 PCs (current and fully patched) running Avast.  Since the last update to the current program version, a file called lscache.dat has been writing constantly on all PCs (somewhere between 300kB/s-3MB/s).

I've tried deleted lscache.dat in safe mode but it comes back after a full reboot.  It only stops writing when I turn the file shield off.

It looks like this has happened in prior versions as well (based on google searches).

Anyone else seeing this?

Offline Evjls

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #1 on: March 29, 2018, 11:53:48 PM »
it's normal for avast. That's why I don't like it.

the solution is, you should disable "transient caching" in file shield settings

Offline Alikhan

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #2 on: March 30, 2018, 01:24:09 PM »
Where are you getting the stats that Avast is constantly writing that much to lscache.dat?
Windows 10 Home 64-bit • Avast Free (latest stable version) •  Malwarebytes 4 Premium (On-Demand) • Windows Firewall Control • Google Chrome • LastPass • CCleaner • O&O ShutUp10 •

Offline nigeltufnelny

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #3 on: March 30, 2018, 04:28:32 PM »
I see it in resource monitor

Offline Alikhan

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #4 on: March 30, 2018, 04:30:24 PM »
Could you show a screenshot so I can get this escalated to the Avast devs?
Windows 10 Home 64-bit • Avast Free (latest stable version) •  Malwarebytes 4 Premium (On-Demand) • Windows Firewall Control • Google Chrome • LastPass • CCleaner • O&O ShutUp10 •

Offline nigeltufnelny

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #5 on: March 30, 2018, 05:17:56 PM »
attached

Offline bob3160

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #6 on: March 30, 2018, 05:39:44 PM »
I've already posted it on the developers channel but there hasn't been any response.
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Offline pk

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #7 on: March 30, 2018, 05:51:02 PM »
@nigeltufnelny: thanks for report, I have some additional questions:
1. what's filesize of lscache.dat
2. can you please check filesize again after ~10sec (is it growing, or reducing?)
3. is it possible send me your lscache.dat (compress if needed, e.g. ZIP, RAR or 7zip) to kurtin@avast.com?

Thanks

Offline nigeltufnelny

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #8 on: March 30, 2018, 06:49:45 PM »
Hello,

a) it's about 8.5MB on this computer but varying sizes on my other 3 PCs
b) size is static
c) will send now

Offline nigeltufnelny

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #9 on: April 05, 2018, 07:50:07 PM »
anyone else seeing this?

Offline mchain

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #10 on: April 05, 2018, 10:29:21 PM »
Confirmed.  Avast lscache.dat is active.  Write speed varies from 1,000 KB/sec to 20,000 KB's.  Almost continuously active.
Windows 10 Home 64-bit 22H2 Avast Premier Security version 23.11.6090 (build 23.11.8635.809)
 UI version 1.0.788.  Windows 11 Pro 22H2 Avast Premier Security version 23.11.6090 (build 23.11.8635.809)

Offline Evjls

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #11 on: April 06, 2018, 10:04:51 AM »
I'm also seeing this in all of the machines I have

Therefore, I always disable transient caching so it never happens again
it increases disk lifespan a bit

Offline pk

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #12 on: April 06, 2018, 03:47:11 PM »
Hi guys, thanks for the bug report - we will fix this issue and release an emergency update on Monday.

Offline Alikhan

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #13 on: April 06, 2018, 03:57:30 PM »
Hi guys, thanks for the bug report - we will fix this issue and release an emergency update on Monday.

Thank you for addressing the issue.
Windows 10 Home 64-bit • Avast Free (latest stable version) •  Malwarebytes 4 Premium (On-Demand) • Windows Firewall Control • Google Chrome • LastPass • CCleaner • O&O ShutUp10 •

Offline nigeltufnelny

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Re: lscache.dat constantly writing since update to 18.2.3827.307
« Reply #14 on: April 22, 2018, 06:07:22 PM »
Hi, just wondering when this fix will be released?  Thanks...