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Sorry to hear you’re facing problems 
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example
Or for longer, use three backticks above and below the code snippet:
longer
example
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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 20.04
Operating system and version (eg, Ubuntu 20.04): CentOS Linux release 8.2.2004 (Core)
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.37 (centos)
PHP version (eg, 7.4): PHP 7.4.12
The issue you are facing:
We are experiencing high cpu usage by postgresql processes.
Output from top command:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
894213 postgres 20 0 293508 150652 144556 R 100.0 1.9 15:47.92 postmaster
894214 postgres 20 0 287972 142616 141356 R 100.0 1.8 15:48.46 postmaster
894215 postgres 20 0 287972 142744 141484 R 100.0 1.8 15:48.00 postmaster
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
The output of your Nextcloud log in Admin > Logging:
{"reqId":"YV1B9guLLH0FEAZF28ib7AAAAEc","level":3,"time":"2021-10-06T06:28:06+00:00","remoteAddr":"*.*.*.*","user":"******","app":"PHP","method":"MOVE","url":"/remote.php/dav/files/******/FZOEU/New%20folder","message":{"Exception":"Error","Message":"fread(): read of 8192 bytes failed with errno=21 Is a directory at /var/www/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php#862","Code":0,"Trace":[{"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php","line":862,"function":"fread"},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php","line":930,"function":"readFirstBlock","class":"OC\\Files\\Storage\\Wrapper\\Encryption","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php","line":961,"function":"getHeader","class":"OC\\Files\\Storage\\Wrapper\\Encryption","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Encryption.php","line":294,"function":"getEncryptionModule","class":"OC\\Files\\Storage\\Wrapper\\Encryption","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php","line":278,"function":"rename","class":"OC\\Files\\Storage\\Wrapper\\Encryption","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php","line":278,"function":"rename","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":822,"function":"rename","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/Node.php","line":142,"function":"rename","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":157,"function":"setName","class":"OCA\\DAV\\Connector\\Sabre\\Node","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":641,"function":"move","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpMove","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":474,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":251,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":319,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Server.php","line":332,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/remote.php","line":167,"args":["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":91,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows) mirall/3.3.5stable-Win64 (build 20210930) (Nextcloud, windows-10.0.19042 ClientArchitecture: x86_64 OsArchitecture: x86_64)","version":"20.0.4.0","id":"615d7bb96367f"}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => '******',
'passwordsalt' => '*****',
'secret' => '*******',
'trusted_domains' =>
array (
0 => '*****',
1 => '*****',
),
'trusted_proxies' =>
array (
0 => '******',
),
'datadirectory' => '/opt/data/nextcloud',
'filelocking.enabled' => true,
'memcache.local' => '\\OC\\Memcache\\APCu',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '******',
'port' => 6379,
),
'dbtype' => 'pgsql',
'version' => '20.0.4.0',
'overwrite.cli.url' => 'https://*****',
'dbname' => '******',
'dbhost' => '******',
'dbport' => '5432',
'dbtableprefix' => 'oc_',
'dbuser' => '******',
'dbpassword' => '******',
'installed' => true,
'social_login_auto_redirect' => true,
'overwriteprotocol' => 'https',
'mail_from_address' => 'nextcloud',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => '*****',
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
'encryption.key_storage_migrated' => false,
'mail_smtphost' => '*******',
'mail_smtpport' => '25',
);
The output of your Apache/nginx/system log in /var/log/____:
**** - - [06/Oct/2021:14:00:00 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 255
**** - - [06/Oct/2021:13:59:40 +0200] "GET /index.php/apps/logreader/poll?lastReqId=YV1B9guLLH0FEAZF28ib7AAAAEc HTTP/1.1" 200 22
**** - - [06/Oct/2021:14:00:03 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 254
**** - - [06/Oct/2021:14:00:04 +0200] "PROPFIND /remote.php/webdav/Documents/***/****/***.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:04 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:05 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status?format=json HTTP/1.1" 200 150
**** - - [06/Oct/2021:14:00:05 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:05 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status?format=json HTTP/1.1" 200 150
**** - - [06/Oct/2021:14:00:05 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:05 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:06 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:06 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:06 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 255
**** - - [06/Oct/2021:14:00:07 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:07 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:07 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status?format=json HTTP/1.1" 200 153
**** - - [06/Oct/2021:14:00:07 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:08 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 254
**** - - [06/Oct/2021:14:00:09 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:09 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 254
**** - - [06/Oct/2021:14:00:09 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:13 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:14 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:14 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:14 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:14 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:15 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:17 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:19 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:19 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:00 +0200] "GET /index.php/apps/logreader/poll?lastReqId=YV1B9guLLH0FEAZF28ib7AAAAEc HTTP/1.1" 200 22
**** - - [06/Oct/2021:14:00:21 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:21 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:21 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:22 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 257
**** - - [06/Oct/2021:14:00:24 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:24 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:25 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:25 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:27 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:27 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:28 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:28 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status?format=json HTTP/1.1" 200 153
**** - - [06/Oct/2021:14:00:29 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:29 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:29 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:29 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 401 106
**** - - [06/Oct/2021:14:00:29 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:30 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 255
**** - - [06/Oct/2021:14:00:30 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:33 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 254
**** - - [06/Oct/2021:14:00:34 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:34 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:34 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:35 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status?format=json HTTP/1.1" 200 151
**** - - [06/Oct/2021:14:00:35 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:36 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:36 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:36 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 255
**** - - [06/Oct/2021:14:00:36 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:38 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 254
**** - - [06/Oct/2021:14:00:39 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:39 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 254
**** - - [06/Oct/2021:14:00:39 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:40 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:40 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:20 +0200] "GET /index.php/apps/logreader/poll?lastReqId=YV1B9guLLH0FEAZF28ib7AAAAEc HTTP/1.1" 200 22
**** - - [06/Oct/2021:14:00:42 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:42 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:42 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:43 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:44 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 247
**** - - [06/Oct/2021:14:00:44 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:44 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:44 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:45 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:46 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:47 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:49 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:52 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 257
**** - - [06/Oct/2021:14:00:53 +0200] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 304 -
**** - - [06/Oct/2021:14:00:53 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 248
**** - - [06/Oct/2021:14:00:53 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 2097
**** - - [06/Oct/2021:14:00:54 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:54 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:54 +0200] "PUT /remote.php/dav/files/****/****.xlsx HTTP/1.1" 204 -
**** - - [06/Oct/2021:14:00:55 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:55 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 253
**** - - [06/Oct/2021:14:00:57 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:00:57 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 250
**** - - [06/Oct/2021:14:00:58 +0200] "GET /remote.php/dav/files/****/Joplin/info.json HTTP/1.1" 200 1310
**** - - [06/Oct/2021:14:00:59 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 251
**** - - [06/Oct/2021:14:00:58 +0200] "PROPFIND /remote.php/dav/files/****/Joplin/locks/ HTTP/1.1" 207 277
**** - - [06/Oct/2021:14:00:59 +0200] "PROPFIND /remote.php/dav/files/****/Joplin/locks/ HTTP/1.1" 207 277
**** - - [06/Oct/2021:14:00:59 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 252
**** - - [06/Oct/2021:14:01:00 +0200] "PROPFIND /remote.php/dav/files/****/ HTTP/1.1" 207 255
**** - - [06/Oct/2021:14:00:59 +0200] "PUT /remote.php/dav/files/****/Joplin/temp/timeCheck950812.txt HTTP/1.1" 201 -
**** - - [06/Oct/2021:14:01:00 +0200] "PROPFIND /remote.php/webdav/Documents/****/****/****.pdf HTTP/1.1" 207 777
**** - - [06/Oct/2021:14:00:40 +0200] "GET /index.php/apps/logreader/poll?lastReqId=YV1B9guLLH0FEAZF28ib7AAAAEc HTTP/1.1" 200 22
Hello,
we are having a problem that postgresql services are using around 100% of CPU.
When we run SELECT * FROM pg_stat_activity; we can see that postgresql services are trying to execute SQL statement:
SELECT “fileid”, “storage” FROM “oc_filecache” “fc” WHERE (“fileid” NOT IN (SELECT “fileid” FROM “oc_files_antivirus”)) AND (“mimetype” <> ‘2’) AND (“path” LIKE ‘files/%’) AND ((“fc”.“size” <> ‘0’)AND (“fc”.“size” < $1)) LIMIT 1000
We tried to execute EXPLAIN ANALYZE for the above SQL statement and it took 5176426.636 ms to finish.
I am not sure what to do, so any help is greatly appreciated.