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dbmon.sh
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dbmon.sh
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#!/bin/sh
DURATION=${DURATION:-0}
INCR=${INCR:-1}
HOST=${HOST:-localhost}
PORT=${PORT:-389}
BINDDN=${BINDDN:-"cn=directory manager"}
BINDPW=${BINDPW:-"secret"}
DBLIST=${DBLIST:-all}
ldbmdn="cn=ldbm database,cn=plugins,cn=config"
VERBOSE=${VERBOSE:-0}
parseldif() {
awk -v dblist="$DBLIST" -v verbose=$VERBOSE -v indexlist="$INDEXLIST" -F '[:,= ]+' '
function printary(ary) {
for (ii in ary) { print ii, "=", ary[ii] }
}
BEGIN {
pagesize=8192 ; CONVFMT="%.3f" ; OFMT=CONVFMT ; SUBSEP=","
alldb=0
if (dblist == "all") {
alldb=1
} else {
split(dblist, dbnames)
for (key in dbnames) { val=dbnames[key] ; dbnames[tolower(val)]=val; delete dbnames[key] }
}
allindex=0
if (indexlist == "all") {
allindex=1
} else {
split(indexlist, idxnames)
for (key in idxnames) { val=idxnames[key] ; idxnames[tolower(val)]=val; delete idxnames[key] }
}
fn="entcur entmax entcnt dncur dnmax dncnt"
split(fn, fields)
havednstats=0
maxdbnamelen=0
}
/^[^ ]|^$/ {origline = $0; $0 = unwrapline; unwrapline = origline}
/^ / {sub(/^ /, ""); unwrapline = unwrapline $0; next}
/^nsslapd-dbcachesize/ { dbcachesize=$2 }
/^nsslapd-db-page-size/ { pagesize=$2 }
/^dbcachehitratio/ { dbhitratio=$2 }
/^dbcachepagein/ { dbcachepagein=$2 }
/^dbcachepageout/ { dbcachepageout=$2 }
/^nsslapd-db-page-ro-evict-rate/ { dbroevict=$2 }
/^nsslapd-db-pages-in-use/ { dbpages=$2 }
/^dn: cn=monitor, *cn=[a-zA-Z0-9][a-zA-Z0-9_\.\-]*, *cn=ldbm database, *cn=plugins, *cn=config/ {
idxnum=-1
idxname=""
dbname=tolower($5)
if ((dbname in dbnames) || alldb) {
len=length(dbname) ; if (len > maxdbnamelen) { maxdbnamelen=len }
if (!(dbname in dbnames)) { dbnames[dbname] = dbname }
}
}
/^currententrycachesize/ { stats[dbname,"entcur"]=$2 }
/^maxentrycachesize/ { stats[dbname,"entmax"]=$2 }
/^currententrycachecount/ { stats[dbname,"entcnt"]=$2 }
/^currentdncachesize/ { stats[dbname,"dncur"]=$2 ; havednstats=1 }
/^maxdncachesize/ { stats[dbname,"dnmax"]=$2 }
/^currentdncachecount/ { stats[dbname,"dncnt"]=$2 }
/^dbfilename-/ {
#rhds
#dbfilename-3: userRoot/id2entry.db4
#sunds
#dbfilename-id2entry: /full/path/to/db/dbname/dbname_id2entry.dbX
if (dbname in dbnames) {
split($0, idxline, /[ :/.-]+/)
idxname=tolower(idxline[4])
dbn=tolower(idxline[3])
ilen=length(idxline)
sundbn=tolower(idxline[ilen-2])
sunidxname=tolower(idxline[2])
if ((dbn == dbname) && (allindex || (idxname in idxnames))) {
idxnum=idxline[2]
if (!(idxname in idxnames)) { idxnames[idxname] = idxname }
len = length(idxname)
if (len > idxmaxlen[dbn]) { idxmaxlen[dbn] = len }
} else if ((sundbn == dbname) && (allindex || (sunidxname in idxnames))) {
idxname=sunidxname
idxnum=1 # no index number just index name
if (!(idxname in idxnames)) { idxnames[idxname] = idxname }
len = length(idxname)
if (len > idxmaxlen[sundbn]) { idxmaxlen[sundbn] = len }
} else {
# print "index", idxline[4], "not in idxnames"
}
} else {
# print "dbname", dbname, "not in dbnames"
}
}
/^dbfilepagein-/ { if (idxnum >= 0) { idxstats[dbname,idxname,"pagein"] = $2 } }
/^dbfilepageout-/ { if (idxnum >= 0) { idxstats[dbname,idxname,"pageout"] = $2 } }
END {
free=(dbcachesize-(pagesize*dbpages))
freeratio=free/dbcachesize
if (verbose > 1) {
print "# dbcachefree - free bytes in dbcache"
print "# free% - percent free in dbcache"
print "# roevicts - number of read-only pages dropped from cache to make room for other pages"
print "# if this is non-zero, it means the dbcache is maxed out and there is page churn"
print "# hit% - percent of requests that are served by cache"
print "# pagein - number of pages read into the cache"
print "# pageout - number of pages dropped from the cache"
}
print "dbcachefree", free, "free%", (freeratio*100), "roevicts", dbroevict, "hit%", dbhitratio, "pagein", dbcachepagein, "pageout", dbcachepageout
if (verbose > 1) {
print "# dbname - name of database instance - the row shows the entry cache stats"
print "# count - number of entries in cache"
print "# free - number of free bytes in cache"
print "# free% - percent free in cache"
print "# size - average size of date in cache in bytes (current size/count)"
if (havednstats) {
print "# DNcache - the line below the entry cache stats are the DN cache stats"
print "# count - number of dns in dn cache"
print "# free - number of free bytes in dn cache"
print "# free% - percent free in dn cache"
print "# size - average size of dn in dn cache in bytes (currentdncachesize/currentdncachecount)"
print "# under each db are the list of selected indexes specified with INDEXLIST"
}
}
if (havednstats) { # make sure there is enough room for dbname:ent and dbname:dn
maxdbnamelen += 4 # :ent
dbentext = ":ent"
dbdnext = ":dn "
} else {
dbentext = ""
dbdnext = ""
}
if (maxdbnamelen < 6) { # len of "dbname"
maxdbnamelen = 6
}
if (verbose > 0) {
fmtstr = sprintf("%%%d.%ds %%10.10s %%13.13s %%6.6s %%7.7s\n", maxdbnamelen, maxdbnamelen)
printf fmtstr, "dbname", "count", "free", "free%", "size"
}
for (dbn in dbnames) {
cur=stats[dbn,"entcur"]
max=stats[dbn,"entmax"]
cnt=stats[dbn,"entcnt"]
free=max-cur
freep=free/max*100
size=(cnt == 0) ? 0 : cur/cnt
fmtstr = sprintf("%%%d.%ds %%10d %%13d %%6.1f %%7.1f\n", maxdbnamelen, maxdbnamelen)
printf fmtstr, dbnames[dbn] dbentext, cnt, free, freep, size
if (havednstats) {
dcur=stats[dbn,"dncur"]
dmax=stats[dbn,"dnmax"]
dcnt=stats[dbn,"dncnt"]
dfree=dmax-dcur
dfreep=dfree/dmax*100
dsize=(dcnt == 0) ? 0 : dcur/dcnt
printf fmtstr, dbnames[dbn] dbdnext, dcnt, dfree, dfreep, dsize
}
if (indexlist) {
len = idxmaxlen[dbn]
fmtstr = sprintf("%%%d.%ds %%%d.%ds pagein %%8d pageout %%8d\n", maxdbnamelen, maxdbnamelen, len, len)
for (idx in idxnames) {
ipi = idxstats[dbn,idx,"pagein"]
ipo = idxstats[dbn,idx,"pageout"]
# not every db will have every index
if (ipi != "" && ipo != "") {
printf fmtstr, "+", idxnames[idx], ipi, ipo
}
}
}
}
}
'
}
dodbmon() {
while [ 1 ] ; do
date
ldapsearch -xLLL -h $HOST -p $PORT -D "$BINDDN" -w "$BINDPW" -b "$ldbmdn" '(|(cn=config)(cn=database)(cn=monitor))' \
| parseldif
echo ""
sleep $INCR
done
}
dodbmon