2026-03-12 20:23:15

2026-03-12 21:23:47 +01:00
parent eab4b36eca
commit 93039b8489
3332 changed files with 699614 additions and 0 deletions
--- a/vdh/memstat.sh
+++ b/vdh/memstat.sh
@@ -0,0 +1,64 @@
+#!/bin/bash
+#set -x
+[ "$1" = '--oneshot' ] && ONESHOT="yes" || ONESHOT="no"
+PAGESIZE=30
+SLEEP_TIME=3
+[ $ONESHOT = "no" ] && printf "          Free          Shmem  Mapped+Cached           Anon     Pagetables    KernelStack        Buffers           Slab       SwpCache        HP Used        HP Rsvd        HP Free        Unknown   %%\n"
+ROWCOUNTER=0
+while ( true ); do
+  # 1 get meminfo
+  MEMINFO=$( cat /proc/meminfo )
+  # 2 get relevant data
+  MEMTOTAL=$( echo "$MEMINFO" | awk '/^MemTotal/ { print $2 }')
+  MEMFREE=$( echo "$MEMINFO" | awk '/^MemFree/ { print $2 }')
+  KERNELSTACK=$( echo "$MEMINFO" | awk '/^KernelStack/ { print $2 }')
+  BUFFERS=$( echo "$MEMINFO" | awk '/^Buffers/ { print $2 }')
+  CACHED=$( echo "$MEMINFO" | awk '/^Cached/ { print $2 }')
+  PAGETABLES=$( echo "$MEMINFO" | awk '/^PageTables/ { print $2 }')
+  SHMEM=$( echo "$MEMINFO" | awk '/^Shmem:/ { print $2 }')
+  ANONPAGES=$( echo "$MEMINFO" | awk '/^AnonPages/ { print $2 }')
+  SLAB=$( echo "$MEMINFO" | awk '/^Slab/ { print $2 }')
+  SWAPCACHED=$( echo "$MEMINFO" | awk '/^SwapCached/ { print $2 }')
+  # hugepages are expressed in pages, not KB
+  HP_TOTAL=$( echo "$MEMINFO" | awk '/^HugePages_Total/ { print $2 }')
+  HP_RSVD=$( echo "$MEMINFO" | awk '/^HugePages_Rsvd/ { print $2 }')
+  HP_FREE=$( echo "$MEMINFO" | awk '/^HugePages_Free/ { print $2 }')
+  HP_SIZE=$( echo "$MEMINFO" | awk '/^Hugepagesize/ { print $2 }')
+  # swap
+  SWAP_TOTAL=$( echo "$MEMINFO" | awk '/^SwapTotal/ { print $2 }')
+  SWAP_FREE=$( echo "$MEMINFO" | awk '/^SwapFree/ { print $2 }')
+  # 3 define final data
+  # MEMTOTAL
+  # MEMFREE
+  # KERNELSTACK
+  # BUFFERS
+  CACHED=$(( $CACHED-$SHMEM ))
+  # PAGETABLES
+  # SHMEM
+  # ANONPAGES
+  # SLAB
+  # SWAPCACHED
+  HP_USED_KB=$(( ($HP_TOTAL-$HP_FREE)*$HP_SIZE ))
+  HP_RSVD_KB=$(( $HP_RSVD*$HP_SIZE ))
+  HP_REALFREE_KB=$(( ($HP_FREE-$HP_RSVD)*$HP_SIZE ))
+  SWAP_USED=$(( $SWAP_TOTAL-$SWAP_FREE ))
+  SWAP_PCT=$(( ($SWAP_USED*100)/$SWAP_TOTAL ))
+  #
+  ACCT_FOR_MEM_TOTAL=$(( $MEMFREE+$KERNELSTACK+$BUFFERS+$CACHED+$PAGETABLES+$SHMEM+$MAPPED+$ANONPAGES+$SLAB+$SWAPCACHED+$HP_USED_KB+$HP_RSVD_KB+$HP_REALFREE_KB ))
+  UNACCT_FOR=$(( $MEMTOTAL-$ACCT_FOR_MEM_TOTAL ))
+  UA_PCT=$(( ($UNACCT_FOR*100)/$MEMTOTAL ))
+  if [ $ONESHOT = "no" ]; then
+    # visualize
+    printf "%14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %3d\n" $MEMFREE $SHMEM $CACHED $ANONPAGES $PAGETABLES $KERNELSTACK $BUFFERS $SLAB $SWAPCACHED $HP_USED_KB $HP_RSVD_KB $HP_REALFREE_KB $UNACCT_FOR $UA_PCT
+    sleep $SLEEP_TIME
+    let ROWCOUNTER++
+    if (( $ROWCOUNTER % $PAGESIZE == 0 )); then
+      printf "          Free          Shmem  Mapped+Cached           Anon     Pagetables    KernelStack        Buffers           Slab       SwpCache        HP Used        HP Rsvd        HP Free        Unknown   %%\n"
+    fi
+  fi
+  if [ $ONESHOT = "yes" ]; then
+    printf "Free         %14d\nShmem        %14d\nMapped+Cached%14d\nAnon         %14d\nPagetables   %14d\nKernelStack  %14d\nBuffers      %14d\nSlab         %14d\nSwpCache     %14d\nHP Used      %14d\nHP Rsvd      %14d\nHP Free      %14d\nUnknown      %14d (%3d%%)\nTotal memory %14d\n---------------------------\nTotal swp    %14d\nUsed swp     %14d (%3d%%)\n" $MEMFREE $SHMEM $CACHED $ANONPAGES $PAGETABLES $KERNELSTACK $BUFFERS $SLAB $SWAPCACHED $HP_USED_KB $HP_RSVD_KB $HP_REALFREE_KB $UNACCT_FOR $UA_PCT $MEMTOTAL $SWAP_TOTAL $SWAP_USED $SWAP_PCT
+    break
+  fi
+done
+