Memory reporting incorrect values
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It could be interesting to report all the information the guest can provide us, but there is no xenstore schema for that; and no support from xcp-rrdd either.
Aside that, I don't think xe-guest-utilities consider cache memory as used; but there may be corner cases.
What givescat /proc/meminfo -
@planedrop I'm using "citrix" tools for windows and I haven't noticed any of mine reporting any cached ram. Yet
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@jebrown OK good to know. This may be different on different OSes though, Windows may just report actually used RAM and leave out anything that is cached.
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Thank you all for your feedback on this matter. The OS used in this case ins Ubuntu 22.04.5 LTS.
@TeddyAstie said in Memory reporting incorrect values:
What gives cat /proc/meminfo
cat /proc/meminfo MemTotal: 8123972 kB MemFree: 440556 kB MemAvailable: 5419780 kB Buffers: 410852 kB Cached: 4761852 kB SwapCached: 328 kB Active: 2995088 kB Inactive: 3405912 kB Active(anon): 723800 kB Inactive(anon): 1399348 kB Active(file): 2271288 kB Inactive(file): 2006564 kB Unevictable: 27620 kB Mlocked: 27620 kB SwapTotal: 4194300 kB SwapFree: 4191228 kB Dirty: 1508 kB Writeback: 0 kB AnonPages: 1255676 kB Mapped: 939728 kB Shmem: 885788 kB KReclaimable: 995468 kB Slab: 1154076 kB SReclaimable: 995468 kB SUnreclaim: 158608 kB KernelStack: 4656 kB PageTables: 13848 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 8256284 kB Committed_AS: 5873420 kB VmallocTotal: 34359738367 kB VmallocUsed: 18896 kB VmallocChunk: 0 kB Percpu: 4192 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB ShmemHugePages: 0 kB ShmemPmdMapped: 0 kB FileHugePages: 0 kB FilePmdMapped: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugetlb: 0 kB DirectMap4k: 307200 kB DirectMap2M: 8077312 kB DirectMap1G: 1048576 kB -
@fred974 the tools should be reporting the value from
MemAvailable, so buffer/cache should not be considered as in-use. What do you see (reported by the agent) in xenstore ?From within the guest:
# xenstore ls data meminfo_free = "324060" meminfo_total = "973736" os_distro = "Debian" os_name = "Debian 11" os_uname = "5.10.0-21-amd64" updated = "1"The
meminfo_freeshould match what you see in/proc/meminfo. -
@yann said in Memory reporting incorrect values:
xenstore ls data
Here is what I see:
cat /proc/meminfoMemTotal: 8123972 kB MemFree: 428388 kB MemAvailable: 5419696 kB Buffers: 411604 kB Cached: 4771524 kB SwapCached: 328 kB Active: 3060024 kB Inactive: 3339116 kB Active(anon): 736300 kB Inactive(anon): 1374628 kB Active(file): 2323724 kB Inactive(file): 1964488 kB Unevictable: 27620 kB Mlocked: 27620 kB SwapTotal: 4194300 kB SwapFree: 4191228 kB Dirty: 284 kB Writeback: 0 kB AnonPages: 1243360 kB Mapped: 919268 kB Shmem: 885852 kB KReclaimable: 997192 kB Slab: 1155308 kB SReclaimable: 997192 kB SUnreclaim: 158116 kB KernelStack: 4432 kB PageTables: 13128 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 8256284 kB Committed_AS: 5854320 kB VmallocTotal: 34359738367 kB VmallocUsed: 18656 kB VmallocChunk: 0 kB Percpu: 4192 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB ShmemHugePages: 0 kB ShmemPmdMapped: 0 kB FileHugePages: 0 kB FilePmdMapped: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugetlb: 0 kB DirectMap4k: 307200 kB DirectMap2M: 8077312 kB DirectMap1G: 1048576 kBxenstore ls datameminfo_free = "422892" meminfo_total = "8123972" os_distro = "ubuntu" os_majorver = "22" os_minorver = "04" os_name = "Ubuntu 22.04.5 LTS" os_uname = "5.15.0-128-generic" updated = "Mon Jan 6 11:52:45 2025" volumes = "" 0 = "" extents = "" 0 = "xvda" filesystem = "ext4" free = "142059319296" mount_points = "" 0 = "/" name = "/dev/xvda1(072768fc-9db5-4fa4-a6a1-c98afdd82d32)" size = "171682283008" 1 = "" extents = "" 0 = "xvda" free = "4138934272" name = "/dev/xvda14" size = "4194304" 2 = "" extents = "" 0 = "xvda" filesystem = "vfat" free = "103057408" mount_points = "" 0 = "/boot/efi" name = "/dev/xvda15(D9A6-D2AA)" size = "111149056" 3 = "" extents = "" 0 = "xvdb" free = "4138934272" name = "/dev/xvdb1(355A-4FC2)" size = "10486272"htop
XOA
XO Community
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It would be great to have a bit for details on the memory so we can monitor the system better.
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@yann said in Memory reporting incorrect values:
@fred974 the tools should be reporting the value from MemAvailable, so buffer/cache should not be considered as in-use.
Doesn't seem to be the case
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@fred974 right, it is reporting
MemFreehere.What does
xenstore ls attr/PVAddonsshow for this VM? And which kernel version is it using?Old
xe-guest-utilitiesbefore v7.30 indeed reportedMemFree, which XenServer then improved in v8.4 to still report something for kernels older than 3.14 which did not haveMemAvailableyet, but Ubuntu 22.04 ships a decently-recent kernel, so I suspect it would be rather due to an oldxe-guest-utilities. -
@yann said in Memory reporting incorrect values:
What does xenstore ls attr/PVAddons show for this VM? And which kernel version is it using?
BuildVersion = "0" Installed = "1" MajorVersion = "6" MicroVersion = "80" MinorVersion = "6"hostnamectl statusStatic hostname: WEB1-OLS-QHUK Transient hostname: web1-ols-qh-uk Icon name: computer-vm Chassis: vm Machine ID: 3b1da9b8e5cf4ecda845219bxxx Boot ID: 19308dbfd7d347c699985e82xxx Virtualization: xen Operating System: Ubuntu 22.04.5 LTS Kernel: Linux 5.15.0-128-generic Architecture: x86-64 Hardware Vendor: Xen Hardware Model: HVM domU -
@fred974 v6.80.6 is definitely very old, and did report
MemFree, we ship v7.30 with XCP-ng 8.2. You will likely want to update it, from the "XCP-ng tools" SR. -
@yann said in Memory reporting incorrect values:
@fred974 v6.80.6 is definitely very old, and did report MemFree, we ship v7.30 with XCP-ng 8.2. You will likely want to update it, from the "XCP-ng tools" SR.
Probably because I installed xe-guest-utilities from ububtu repo.. I tried to update from the CD and got the following error:
bash /mnt/Linux/install.shDetected `Ubuntu 22.04.5 LTS' (ubuntu version 22). The following changes will be made to this Virtual Machine: * update arp_notify sysctl. * packages to be installed/upgraded: - xe-guest-utilities_7.30.0-12_amd64.deb Continue? [y/n] y (Reading database ... 136958 files and directories currently installed.) Preparing to unpack .../xe-guest-utilities_7.30.0-12_amd64.deb ... Unpacking xe-guest-utilities (7.30.0-12) over (7.20.2-0ubuntu1~22.04.2) ... dpkg: error processing archive /mnt/Linux/xe-guest-utilities_7.30.0-12_amd64.deb (--install): trying to overwrite '/usr/bin/xenstore', which is also in package xenstore-utils 4.16.0-1~ubuntu2.1 dpkg-deb: error: paste subprocess was killed by signal (Broken pipe) Errors were encountered while processing: /mnt/Linux/xe-guest-utilities_7.30.0-12_amd64.debCould anyone advice of how to fix this issue? I tried apt remove xe-guest-utilities and got the same error
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@fred974 there is an undeclared conflict between the
xe-guest-utilitiesin the ISO andxenstore-utils, you can install the former after removing the latter (but yes, it is a problem, the Go implementation ofxenstoretools should not be in this package). -
@yann I removed the tools using
apt remove xe-guest-utilitiesand tried to install from the cd and had the same error
apt remove xe-guest-utilitiesReading package lists... Done Building dependency tree... Done Reading state information... Done The following packages were automatically installed and are no longer required: dbconfig-common dbconfig-mysql icc-profiles-free libaprutil1-dbd-sqlite3 libaprutil1-ldap libjs-bootstrap4 libjs-codemirror libjs-jquery-mousewheel libjs-jquery-timepicker libjs-jquery-ui libjs-popper.js libjs-sizzle liblua5.3-0 libmcrypt4 node-jquery php-common php-google-recaptcha php-mariadb-mysql-kbs php-nikic-fast-route php-phpmyadmin-motranslator php-phpmyadmin-shapefile php-phpseclib php-psr-cache php-psr-container php-psr-log php-symfony-cache php-symfony-cache-contracts php-symfony-dependency-injection php-symfony-deprecation-contracts php-symfony-expression-language php-symfony-polyfill-php80 php-symfony-polyfill-php81 php-symfony-service-contracts php-symfony-var-exporter php-tcpdf ssl-cert Use 'apt autoremove' to remove them. The following packages will be REMOVED: xe-guest-utilities 0 upgraded, 0 newly installed, 1 to remove and 16 not upgraded. After this operation, 1889 kB disk space will be freed. N: Ignoring file 'mariadb.list.old_1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension Do you want to continue? [Y/n] y (Reading database ... 136958 files and directories currently installed.) Removing xe-guest-utilities (7.20.2-0ubuntu1~22.04.2) ... needrestart is being skipped since dpkg has failed root@WEB1-OLS-QHUK:/home/fetheve/Linux# apt autoremove Reading package lists... Done Building dependency tree... Done Reading state information... Done The following packages will be REMOVED: dbconfig-common dbconfig-mysql icc-profiles-free libaprutil1-dbd-sqlite3 libaprutil1-ldap libjs-bootstrap4 libjs-codemirror libjs-jquery-mousewheel libjs-jquery-timepicker libjs-jquery-ui libjs-popper.js libjs-sizzle liblua5.3-0 libmcrypt4 node-jquery php-common php-google-recaptcha php-mariadb-mysql-kbs php-nikic-fast-route php-phpmyadmin-motranslator php-phpmyadmin-shapefile php-phpseclib php-psr-cache php-psr-container php-psr-log php-symfony-cache php-symfony-cache-contracts php-symfony-dependency-injection php-symfony-deprecation-contracts php-symfony-expression-language php-symfony-polyfill-php80 php-symfony-polyfill-php81 php-symfony-service-contracts php-symfony-var-exporter php-tcpdf ssl-cert 0 upgraded, 0 newly installed, 36 to remove and 15 not upgraded. After this operation, 42.0 MB disk space will be freed. N: Ignoring file 'mariadb.list.old_1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension Do you want to continue? [Y/n] y (Reading database ... 136950 files and directories currently installed.) Removing dbconfig-mysql (2.0.21) ... Removing dbconfig-common (2.0.21) ... Removing php-tcpdf (6.4.4+dfsg1-1) ... Removing icc-profiles-free (2.0.1+dfsg-1.1) ... Removing libaprutil1-dbd-sqlite3:amd64 (1.6.1-5ubuntu4.22.04.2) ... Removing libaprutil1-ldap:amd64 (1.6.1-5ubuntu4.22.04.2) ... Removing libjs-bootstrap4 (4.6.0+dfsg1-4) ... Removing libjs-codemirror (5.65.0+~cs5.83.9-1) ... Removing libjs-jquery-mousewheel (1:3.1.13-5) ... Removing libjs-jquery-timepicker (1.6.3-1) ... Removing libjs-jquery-ui (1.13.1+dfsg-1) ... Removing libjs-popper.js (1.16.1+ds-5) ... Removing libjs-sizzle (2.3.6+ds+~2.3.3-1) ... Removing liblua5.3-0:amd64 (5.3.6-1build1) ... Removing libmcrypt4 (2.5.8-7) ... Removing node-jquery (3.6.0+dfsg+~3.5.13-1) ... Removing php-phpmyadmin-motranslator (5.2.0-1build1) ... Removing php-symfony-expression-language (5.4.4+dfsg-1ubuntu8) ... Removing php-symfony-cache (5.4.4+dfsg-1ubuntu8) ... Removing php-symfony-var-exporter (5.4.4+dfsg-1ubuntu8) ... Removing php-symfony-dependency-injection (5.4.4+dfsg-1ubuntu8) ... Removing php-symfony-service-contracts (2.4.0-1ubuntu2) ... Removing php-google-recaptcha (1.2.4-3) ... Removing php-mariadb-mysql-kbs (1.2.12-1) ... Removing php-nikic-fast-route (1.3.0-3) ... Removing php-phpmyadmin-shapefile (2.1-5) ... Removing php-phpseclib (2.0.36-1) ... Removing php-symfony-cache-contracts (2.4.0-1ubuntu2) ... Removing php-psr-cache (3.0.0-1) ... Removing php-psr-container (2.0.2-1) ... Removing php-psr-log (3.0.0-1) ... Removing php-symfony-deprecation-contracts (2.4.0-1ubuntu2) ... Removing php-symfony-polyfill-php80 (1.24.0-1ubuntu2) ... Removing php-symfony-polyfill-php81 (1.24.0-1ubuntu2) ... Removing ssl-cert (1.1.2) ... Removing php-common (2:92ubuntu1) ... Warning: Stopping phpsessionclean.service, but it can still be activated by: phpsessionclean.timer Processing triggers for man-db (2.10.2-1) ... Processing triggers for libc-bin (2.35-0ubuntu3.8) ... Scanning processes... Scanning linux images... Running kernel seems to be up-to-date. No services need to be restarted. No containers need to be restarted. No user sessions are running outdated binaries. No VM guests are running outdated hypervisor (qemu) binaries on this host.bash /mnt/Linux/install.shDetected `Ubuntu 22.04.5 LTS' (ubuntu version 22). The following changes will be made to this Virtual Machine: * update arp_notify sysctl. * packages to be installed/upgraded: - xe-guest-utilities_7.30.0-12_amd64.deb Continue? [y/n] y Selecting previously unselected package xe-guest-utilities. (Reading database ... 134088 files and directories currently installed.) Preparing to unpack .../xe-guest-utilities_7.30.0-12_amd64.deb ... Unpacking xe-guest-utilities (7.30.0-12) ... dpkg: error processing archive /mnt/Linux/xe-guest-utilities_7.30.0-12_amd64.deb (--install): trying to overwrite '/usr/bin/xenstore', which is also in package xenstore-utils 4.16.0-1~ubuntu2.1 dpkg-deb: error: paste subprocess was killed by signal (Broken pipe) Errors were encountered while processing: /mnt/Linux/xe-guest-utilities_7.30.0-12_amd64.debHow can I fix this?
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@fred974 said in Memory reporting incorrect values:
xenstore-utils
apt remove xenstore-utilsfix the installation issue. -
Its seem to be reporting correctly now. Thank you all for your help.
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O olivierlambert marked this topic as a question on
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O olivierlambert has marked this topic as solved on
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Great news
