Ama xoogaa tetrisology ah.
Wax kasta oo cusub si fiican baa loo illoobay oo duug ah.
Epigraphs.
Abuurista dhibaatada
Waa lagama maarmaan in si joogto ah loo soo dejiyo faylka log-ga PostgreSQL ee hadda jira laga bilaabo daruurta AWS una soo dejiso faylka maxalliga ah Linux martigeliye. Ma aha waqtiga dhabta ah, laakiin, aan dhahno, dib u dhac yar.
Muddada cusboonaysiinta faylka log waa 5 daqiiqo.
Faylka log ee AWS waa la beddelaa saacad kasta.
Qalabka la isticmaalay
Si aad faylka logu geyso martida loo yahay, qoraalka bash ayaa la isticmaalaa kaas oo wacaya AWS API"".
Qodobada:
- --db-tusaale-aqoonsiga: AWS magaca tusaale;
- --log-file-name: magaca faylka log ee hadda la sameeyay
- --max-item: Tirada guud ee alaabta lagu soo celiyay soo-saarka amarka.Baaxadda qaybta faylka la soo dejinayo.
- --starting-token: bilawga calaamada qaybta
Xaaladdan gaarka ah, hawsha rarista logyada ayaa kacday intii lagu jiray koorsada shaqada
Oo si fudud waa hawl xiiso leh, tababarka iyo kala duwanaanta saacadaha shaqada.
Waxaan u qaadan lahaa in dhibka mar hore la xalliyay, sababtuna tahay wax-yaraanteeda. Laakiin raadinta degdega ah ee Google ma aysan dhalin wax xal ah, manaan lahayn rabitaan gaar ah oo aan qoto dheer ku sii wado. Si kastaba ha ahaatee, waxay ahayd jimicsi fiican.
Si rasmi ah hawsha
Faylka log ee ka dhashay waa xariiqyo dhererkoodu doorsoomayo. Sawir ahaan, faylka log waxaa lagu matali karaa wax sidan oo kale ah:
Tani miyay wax ku xasuusinaysaa? Maxay Tetris ka leedahay tan? Hagaag, waa kan waxa ay ku saabsan tahay.
Haddii aan qiyaasno fursadaha suurtogalka ah ee soo baxa marka la soo dhejiyo faylka soo socda si garaaf ahaan ah (fududnaanta, kiiskan, ha u oggolow xariiqdu inay yeeshaan dherer isku mid ah), waxaan helnaa Qaybaha Tetris caadiga ah:
1) Faylka gabi ahaan waa la soo dejiyay waana faylka ugu dambeeya. Cabbirka qaybtu way ka weyn tahay cabbirka faylka u dambeeya:
2) Faylku wuxuu leeyahay sii socosho Cabbirka qaybtu way ka yar tahay cabbirka faylka u dambeeya:
3) Faylku waa siiwad faylkii hore wuxuuna leeyahay siiwad Cabbirka jajabku wuu ka yar yahay inta ka hadhay faylka u dambeeya:
4) Faylku waa sii wadida galka hore waana faylka ugu dambeeya. Cabbirka jajabku wuxuu ka weyn yahay cabbirka inta ka hartay faylka ugu dambeeya:
Hawshu waa in la ururiyo leydi ama la ciyaaro Tetris heer cusub.
Dhibaatooyinka soo baxa inta lagu jiro xalinta dhibaatada
1) Ku dheji xariiq 2 qaybood ah
Guud ahaan, ma jirin dhibaatooyin gaar ah. Dhibaato caadi ah oo ka timid koorsada barnaamijka aasaasiga ah.
Cabbirka adeegga ugu fiican
Laakiin tani waa wax yar oo xiiso leh.
Nasiib darro, ma jirto dariiqa loo isticmaalo kabista ka dib calaamadda qaybta hore:
Sidaad horeyba u ogeyd ikhtiyaarka -starting-token waxaa loo isticmaalaa in lagu qeexo meesha laga bilaabo paginating. Doorashadani waxay qaadataa qiyamka String taas oo macnaheedu yahay haddii aad isku daydo inaad ku darto qiimaha ka-hortagga xargaha Xiga ee Xiga, ikhtiyaarka looma tixgelin doono kabid ahaan.
Sidaa darteed, waa inaad u akhridaa qaybo iyo qaybo.
Haddii aad wax ku akhrido qaybo badan, tirada akhrintu way yaraan doontaa, laakiin mugga ayaa noqon doona ugu badnaan.
Haddii aad wax ku akhrido qaybo yaryar, markaa, liddi ku ah, tirada akhrintu waxay noqon doontaa ugu badnaan, laakiin mugga ayaa noqon doona mid aad u yar.
Haddaba, si loo dhimo isu-socodka iyo guud ahaan bilicda xalka, waxay ahayd inaan la nimaadno xal, nasiib-darro, u ekaa birta.
Si aan u sharaxno, aan ka fiirsanno laba nooc oo si weyn loo fududeeyay ee habka raritaanka faylka log. Tirada akhrinta labada xaaladood waxay kuxirantahay xajmiga qaybta.
1) Ku shub qaybo yaryar:
2) Ku shub qaybo badan:
Sida caadiga ah, xalka ugu fiican waa meel dhexe..
Cabbirka qaybta ayaa ah mid aad u yar, laakiin inta lagu jiro habka akhriska, cabbirka waa la kordhin karaa si loo yareeyo tirada akhrinta.
Waa in la xuso taas In mushkiladda xulashada cabbirka qaybta ugu habboon aan weli si buuxda loo xallin oo u baahan daraasad iyo falanqayn qotodheer oo dheeraad ah. Laga yaabee in yar ka dib.
Sharaxaada guud ee fulinta
Miisaska adeegga ee la isticmaalay
CREATE TABLE endpoint
(
id SERIAL ,
host text
);
TABLE database
(
id SERIAL ,
…
last_aws_log_time text ,
last_aws_nexttoken text ,
aws_max_item_size integer
);
last_aws_log_time — временная метка последнего загруженного лог-файла в формате YYYY-MM-DD-HH24.
last_aws_nexttoken — текстовая метка последней загруженной порции.
aws_max_item_size- эмпирическим путем, подобранный начальный размер порции.
Qoraal buuxa oo qoraal ah
download_aws_piece.sh
#!/bin/bash
#########################################################
# download_aws_piece.sh
# downloan piece of log from AWS
# version HABR
let min_item_size=1024
let max_item_size=1048576
let growth_factor=3
let growth_counter=1
let growth_counter_max=3
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:''STARTED'
AWS_LOG_TIME=$1
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:AWS_LOG_TIME='$AWS_LOG_TIME
database_id=$2
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:database_id='$database_id
RESULT_FILE=$3
endpoint=`psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE_DATABASE -A -t -c "select e.host from endpoint e join database d on e.id = d.endpoint_id where d.id = $database_id "`
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:endpoint='$endpoint
db_instance=`echo $endpoint | awk -F"." '{print toupper($1)}'`
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:db_instance='$db_instance
LOG_FILE=$RESULT_FILE'.tmp_log'
TMP_FILE=$LOG_FILE'.tmp'
TMP_MIDDLE=$LOG_FILE'.tmp_mid'
TMP_MIDDLE2=$LOG_FILE'.tmp_mid2'
current_aws_log_time=`psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -A -t -c "select last_aws_log_time from database where id = $database_id "`
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:current_aws_log_time='$current_aws_log_time
if [[ $current_aws_log_time != $AWS_LOG_TIME ]];
then
is_new_log='1'
if ! psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -v ON_ERROR_STOP=1 -A -t -q -c "update database set last_aws_log_time = '$AWS_LOG_TIME' where id = $database_id "
then
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: FATAL_ERROR - update database set last_aws_log_time .'
exit 1
fi
else
is_new_log='0'
fi
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh:is_new_log='$is_new_log
let last_aws_max_item_size=`psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -A -t -c "select aws_max_item_size from database where id = $database_id "`
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: last_aws_max_item_size='$last_aws_max_item_size
let count=1
if [[ $is_new_log == '1' ]];
then
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: START DOWNLOADING OF NEW AWS LOG'
if ! aws rds download-db-log-file-portion
--max-items $last_aws_max_item_size
--region REGION
--db-instance-identifier $db_instance
--log-file-name error/postgresql.log.$AWS_LOG_TIME > $LOG_FILE
then
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: FATAL_ERROR - Could not get log from AWS .'
exit 2
fi
else
next_token=`psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -v ON_ERROR_STOP=1 -A -t -c "select last_aws_nexttoken from database where id = $database_id "`
if [[ $next_token == '' ]];
then
next_token='0'
fi
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: CONTINUE DOWNLOADING OF AWS LOG'
if ! aws rds download-db-log-file-portion
--max-items $last_aws_max_item_size
--starting-token $next_token
--region REGION
--db-instance-identifier $db_instance
--log-file-name error/postgresql.log.$AWS_LOG_TIME > $LOG_FILE
then
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: FATAL_ERROR - Could not get log from AWS .'
exit 3
fi
line_count=`cat $LOG_FILE | wc -l`
let lines=$line_count-1
tail -$lines $LOG_FILE > $TMP_MIDDLE
mv -f $TMP_MIDDLE $LOG_FILE
fi
next_token_str=`cat $LOG_FILE | grep NEXTTOKEN`
next_token=`echo $next_token_str | awk -F" " '{ print $2}' `
grep -v NEXTTOKEN $LOG_FILE > $TMP_FILE
if [[ $next_token == '' ]];
then
cp $TMP_FILE $RESULT_FILE
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: NEXTTOKEN NOT FOUND - FINISH '
rm $LOG_FILE
rm $TMP_FILE
rm $TMP_MIDDLE
rm $TMP_MIDDLE2
exit 0
else
psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -v ON_ERROR_STOP=1 -A -t -q -c "update database set last_aws_nexttoken = '$next_token' where id = $database_id "
fi
first_str=`tail -1 $TMP_FILE`
line_count=`cat $TMP_FILE | wc -l`
let lines=$line_count-1
head -$lines $TMP_FILE > $RESULT_FILE
###############################################
# MAIN CIRCLE
let count=2
while [[ $next_token != '' ]];
do
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: count='$count
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: START DOWNLOADING OF AWS LOG'
if ! aws rds download-db-log-file-portion
--max-items $last_aws_max_item_size
--starting-token $next_token
--region REGION
--db-instance-identifier $db_instance
--log-file-name error/postgresql.log.$AWS_LOG_TIME > $LOG_FILE
then
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: FATAL_ERROR - Could not get log from AWS .'
exit 4
fi
next_token_str=`cat $LOG_FILE | grep NEXTTOKEN`
next_token=`echo $next_token_str | awk -F" " '{ print $2}' `
TMP_FILE=$LOG_FILE'.tmp'
grep -v NEXTTOKEN $LOG_FILE > $TMP_FILE
last_str=`head -1 $TMP_FILE`
if [[ $next_token == '' ]];
then
concat_str=$first_str$last_str
echo $concat_str >> $RESULT_FILE
line_count=`cat $TMP_FILE | wc -l`
let lines=$line_count-1
tail -$lines $TMP_FILE >> $RESULT_FILE
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: NEXTTOKEN NOT FOUND - FINISH '
rm $LOG_FILE
rm $TMP_FILE
rm $TMP_MIDDLE
rm $TMP_MIDDLE2
exit 0
fi
if [[ $next_token != '' ]];
then
let growth_counter=$growth_counter+1
if [[ $growth_counter -gt $growth_counter_max ]];
then
let last_aws_max_item_size=$last_aws_max_item_size*$growth_factor
let growth_counter=1
fi
if [[ $last_aws_max_item_size -gt $max_item_size ]];
then
let last_aws_max_item_size=$max_item_size
fi
psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -A -t -q -c "update database set last_aws_nexttoken = '$next_token' where id = $database_id "
concat_str=$first_str$last_str
echo $concat_str >> $RESULT_FILE
line_count=`cat $TMP_FILE | wc -l`
let lines=$line_count-1
#############################
#Get middle of file
head -$lines $TMP_FILE > $TMP_MIDDLE
line_count=`cat $TMP_MIDDLE | wc -l`
let lines=$line_count-1
tail -$lines $TMP_MIDDLE > $TMP_MIDDLE2
cat $TMP_MIDDLE2 >> $RESULT_FILE
first_str=`tail -1 $TMP_FILE`
fi
let count=$count+1
done
#
#################################################################
exit 0
Qaybo qoraal ah oo leh sharraxaadyo:
Qiyaasta gelinta qoraalka:
- Wakhtiga shaabadda magaca faylka logga ee qaabka YYYY-MM-DD-HH24: AWS_LOG_TIME=$1
- Aqoonsiga xogta: database_id=$2
- Magaca faylka diiwaanka la ururiyay: RESULT_FILE=$3
Hel shaambada wakhtiga fayl galkii u dambeeyay ee la soo dejiyay:
current_aws_log_time=`psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -A -t -c "select last_aws_log_time from database where id = $database_id "`Haddii shaambada wakhtiga galka log ee u dambeeyay ee la raray aanu ku habboonayn cabbirka gelinta, fayl cusub ayaa la raray:
if [[ $current_aws_log_time != $AWS_LOG_TIME ]];
then
is_new_log='1'
if ! psql -h ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -v ON_ERROR_STOP=1 -A -t -c "update database set last_aws_log_time = '$AWS_LOG_TIME' where id = $database_id "
then
echo '***download_aws_piece.sh -FATAL_ERROR - update database set last_aws_log_time .'
exit 1
fi
else
is_new_log='0'
fi
Waxaan ka helnaa qiimaha summada xigta ee faylka la soo dejiyay:
next_token_str=`cat $LOG_FILE | grep NEXTTOKEN`
next_token=`echo $next_token_str | awk -F" " '{ print $2}' `
Qiimaha xiga ee maran ayaa tilmaamaya in soo dejintu dhammaatay.
Wareeg ahaan, waxaanu tirinnaa qaybo ka mid ah faylka, isku xidhka xariiqyada iyo kordhinta cabbirka qaybta inta lagu jiro jidka:
Loop ugu weyn
# MAIN CIRCLE
let count=2
while [[ $next_token != '' ]];
do
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: count='$count
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: START DOWNLOADING OF AWS LOG'
if ! aws rds download-db-log-file-portion
--max-items $last_aws_max_item_size
--starting-token $next_token
--region REGION
--db-instance-identifier $db_instance
--log-file-name error/postgresql.log.$AWS_LOG_TIME > $LOG_FILE
then
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: FATAL_ERROR - Could not get log from AWS .'
exit 4
fi
next_token_str=`cat $LOG_FILE | grep NEXTTOKEN`
next_token=`echo $next_token_str | awk -F" " '{ print $2}' `
TMP_FILE=$LOG_FILE'.tmp'
grep -v NEXTTOKEN $LOG_FILE > $TMP_FILE
last_str=`head -1 $TMP_FILE`
if [[ $next_token == '' ]];
then
concat_str=$first_str$last_str
echo $concat_str >> $RESULT_FILE
line_count=`cat $TMP_FILE | wc -l`
let lines=$line_count-1
tail -$lines $TMP_FILE >> $RESULT_FILE
echo $(date +%Y%m%d%H%M)': download_aws_piece.sh: NEXTTOKEN NOT FOUND - FINISH '
rm $LOG_FILE
rm $TMP_FILE
rm $TMP_MIDDLE
rm $TMP_MIDDLE2
exit 0
fi
if [[ $next_token != '' ]];
then
let growth_counter=$growth_counter+1
if [[ $growth_counter -gt $growth_counter_max ]];
then
let last_aws_max_item_size=$last_aws_max_item_size*$growth_factor
let growth_counter=1
fi
if [[ $last_aws_max_item_size -gt $max_item_size ]];
then
let last_aws_max_item_size=$max_item_size
fi
psql -h MONITOR_ENDPOINT.rds.amazonaws.com -U USER -d MONITOR_DATABASE -A -t -q -c "update database set last_aws_nexttoken = '$next_token' where id = $database_id "
concat_str=$first_str$last_str
echo $concat_str >> $RESULT_FILE
line_count=`cat $TMP_FILE | wc -l`
let lines=$line_count-1
#############################
#Get middle of file
head -$lines $TMP_FILE > $TMP_MIDDLE
line_count=`cat $TMP_MIDDLE | wc -l`
let lines=$line_count-1
tail -$lines $TMP_MIDDLE > $TMP_MIDDLE2
cat $TMP_MIDDLE2 >> $RESULT_FILE
first_str=`tail -1 $TMP_FILE`
fi
let count=$count+1
done
Maxaa xiga?
Markaa, hawsha dhexdhexaadka ah ee ugu horreysa - ka soo dejinta faylka log ee daruuraha - waa dhammaatay. Maxaa lagu sameeyaa log-ka la soo dejiyay?
Marka hore, waxaad u baahan tahay inaad kala qaybiso faylka log oo aad ka soo saartid codsiyada dhabta ah.
Hawshu si gaar ah uma adka. Qoraal bash fudud ayaa qaban doona shaqada.
upload_log_query.sh
#!/bin/bash
#########################################################
# upload_log_query.sh
# Upload table table from dowloaded aws file
# version HABR
###########################################################
echo 'TIMESTAMP:'$(date +%c)' Upload log_query table '
source_file=$1
echo 'source_file='$source_file
database_id=$2
echo 'database_id='$database_id
beginer=' '
first_line='1'
let "line_count=0"
sql_line=' '
sql_flag=' '
space=' '
cat $source_file | while read line
do
line="$space$line"
if [[ $first_line == "1" ]]; then
beginer=`echo $line | awk -F" " '{ print $1}' `
first_line='0'
fi
current_beginer=`echo $line | awk -F" " '{ print $1}' `
if [[ $current_beginer == $beginer ]]; then
if [[ $sql_flag == '1' ]]; then
sql_flag='0'
log_date=`echo $sql_line | awk -F" " '{ print $1}' `
log_time=`echo $sql_line | awk -F" " '{ print $2}' `
duration=`echo $sql_line | awk -F" " '{ print $5}' `
#replace ' to ''
sql_modline=`echo "$sql_line" | sed 's/'''/''''''/g'`
sql_line=' '
################
#PROCESSING OF THE SQL-SELECT IS HERE
if ! psql -h ENDPOINT.rds.amazonaws.com -U USER -d DATABASE -v ON_ERROR_STOP=1 -A -t -c "select log_query('$ip_port',$database_id , '$log_date' , '$log_time' , '$duration' , '$sql_modline' )"
then
echo 'FATAL_ERROR - log_query '
exit 1
fi
################
fi #if [[ $sql_flag == '1' ]]; then
let "line_count=line_count+1"
check=`echo $line | awk -F" " '{ print $8}' `
check_sql=${check^^}
#echo 'check_sql='$check_sql
if [[ $check_sql == 'SELECT' ]]; then
sql_flag='1'
sql_line="$sql_line$line"
ip_port=`echo $sql_line | awk -F":" '{ print $4}' `
fi
else
if [[ $sql_flag == '1' ]]; then
sql_line="$sql_line$line"
fi
fi #if [[ $current_beginer == $beginer ]]; then
done
Hadda waxaad la shaqayn kartaa weydiinta laga soo doortay faylka log.
Oo dhawr fursadood oo faa'iido leh ayaa furmay.
Weydiimaha la turxaan bixiyay waxay u baahan yihiin in lagu kaydiyo meel. Miis adeeg ayaa loo isticmaalaa tan. log_questry
CREATE TABLE log_query
(
id SERIAL ,
queryid bigint ,
query_md5hash text not null ,
database_id integer not null ,
timepoint timestamp without time zone not null,
duration double precision not null ,
query text not null ,
explained_plan text[],
plan_md5hash text ,
explained_plan_wo_costs text[],
plan_hash_value text ,
baseline_id integer ,
ip text ,
port text
);
ALTER TABLE log_query ADD PRIMARY KEY (id);
ALTER TABLE log_query ADD CONSTRAINT queryid_timepoint_unique_key UNIQUE (queryid, timepoint );
ALTER TABLE log_query ADD CONSTRAINT query_md5hash_timepoint_unique_key UNIQUE (query_md5hash, timepoint );
CREATE INDEX log_query_timepoint_idx ON log_query (timepoint);
CREATE INDEX log_query_queryid_idx ON log_query (queryid);
ALTER TABLE log_query ADD CONSTRAINT database_id_fk FOREIGN KEY (database_id) REFERENCES database (id) ON DELETE CASCADE ;
Habaynta codsiga la kala saaray waxa lagu fuliyaa gudaha plgsql hawlaha"log_questry".
log_query.sql
--log_query.sql
--verison HABR
CREATE OR REPLACE FUNCTION log_query( ip_port text ,log_database_id integer , log_date text , log_time text , duration text , sql_line text ) RETURNS boolean AS $$
DECLARE
result boolean ;
log_timepoint timestamp without time zone ;
log_duration double precision ;
pos integer ;
log_query text ;
activity_string text ;
log_md5hash text ;
log_explain_plan text[] ;
log_planhash text ;
log_plan_wo_costs text[] ;
database_rec record ;
pg_stat_query text ;
test_log_query text ;
log_query_rec record;
found_flag boolean;
pg_stat_history_rec record ;
port_start integer ;
port_end integer ;
client_ip text ;
client_port text ;
log_queryid bigint ;
log_query_text text ;
pg_stat_query_text text ;
BEGIN
result = TRUE ;
RAISE NOTICE '***log_query';
port_start = position('(' in ip_port);
port_end = position(')' in ip_port);
client_ip = substring( ip_port from 1 for port_start-1 );
client_port = substring( ip_port from port_start+1 for port_end-port_start-1 );
SELECT e.host , d.name , d.owner_pwd
INTO database_rec
FROM database d JOIN endpoint e ON e.id = d.endpoint_id
WHERE d.id = log_database_id ;
log_timepoint = to_timestamp(log_date||' '||log_time,'YYYY-MM-DD HH24-MI-SS');
log_duration = duration:: double precision;
pos = position ('SELECT' in UPPER(sql_line) );
log_query = substring( sql_line from pos for LENGTH(sql_line));
log_query = regexp_replace(log_query,' +',' ','g');
log_query = regexp_replace(log_query,';+','','g');
log_query = trim(trailing ' ' from log_query);
log_md5hash = md5( log_query::text );
--Explain execution plan--
EXECUTE 'SELECT dblink_connect(''LINK1'',''host='||database_rec.host||' dbname='||database_rec.name||' user=DATABASE password='||database_rec.owner_pwd||' '')';
log_explain_plan = ARRAY ( SELECT * FROM dblink('LINK1', 'EXPLAIN '||log_query ) AS t (plan text) );
log_plan_wo_costs = ARRAY ( SELECT * FROM dblink('LINK1', 'EXPLAIN ( COSTS FALSE ) '||log_query ) AS t (plan text) );
PERFORM dblink_disconnect('LINK1');
--------------------------
BEGIN
INSERT INTO log_query
(
query_md5hash ,
database_id ,
timepoint ,
duration ,
query ,
explained_plan ,
plan_md5hash ,
explained_plan_wo_costs ,
plan_hash_value ,
ip ,
port
)
VALUES
(
log_md5hash ,
log_database_id ,
log_timepoint ,
log_duration ,
log_query ,
log_explain_plan ,
md5(log_explain_plan::text) ,
log_plan_wo_costs ,
md5(log_plan_wo_costs::text),
client_ip ,
client_port
);
activity_string = 'New query has logged '||
' database_id = '|| log_database_id ||
' query_md5hash='||log_md5hash||
' , timepoint = '||to_char(log_timepoint,'YYYYMMDD HH24:MI:SS');
RAISE NOTICE '%',activity_string;
PERFORM pg_log( log_database_id , 'log_query' , activity_string);
EXCEPTION
WHEN unique_violation THEN
RAISE NOTICE '*** unique_violation *** query already has logged';
END;
SELECT queryid
INTO log_queryid
FROM log_query
WHERE query_md5hash = log_md5hash AND
timepoint = log_timepoint;
IF log_queryid IS NOT NULL
THEN
RAISE NOTICE 'log_query with query_md5hash = % and timepoint = % has already has a QUERYID = %',log_md5hash,log_timepoint , log_queryid ;
RETURN result;
END IF;
------------------------------------------------
RAISE NOTICE 'Update queryid';
SELECT *
INTO log_query_rec
FROM log_query
WHERE query_md5hash = log_md5hash AND timepoint = log_timepoint ;
log_query_rec.query=regexp_replace(log_query_rec.query,';+','','g');
FOR pg_stat_history_rec IN
SELECT
queryid ,
query
FROM
pg_stat_db_queries
WHERE
database_id = log_database_id AND
queryid is not null
LOOP
pg_stat_query = pg_stat_history_rec.query ;
pg_stat_query=regexp_replace(pg_stat_query,'n+',' ','g');
pg_stat_query=regexp_replace(pg_stat_query,'t+',' ','g');
pg_stat_query=regexp_replace(pg_stat_query,' +',' ','g');
pg_stat_query=regexp_replace(pg_stat_query,'$.','%','g');
log_query_text = trim(trailing ' ' from log_query_rec.query);
pg_stat_query_text = pg_stat_query;
--SELECT log_query_rec.query like pg_stat_query INTO found_flag ;
IF (log_query_text LIKE pg_stat_query_text) THEN
found_flag = TRUE ;
ELSE
found_flag = FALSE ;
END IF;
IF found_flag THEN
UPDATE log_query SET queryid = pg_stat_history_rec.queryid WHERE query_md5hash = log_md5hash AND timepoint = log_timepoint ;
activity_string = ' updated queryid = '||pg_stat_history_rec.queryid||
' for log_query with id = '||log_query_rec.id
;
RAISE NOTICE '%',activity_string;
EXIT ;
END IF ;
END LOOP ;
RETURN result ;
END
$$ LANGUAGE plpgsql;
Jadwalka adeegga waxa la isticmaalaa inta lagu jiro habaynta. pg_stat_db_questions, oo ka kooban sawir qaade ah weydiimaha hadda ee miiska pg_stat_taariikhda (Isticmaalka shaxda ayaa halkan lagu sharaxay - )
TABLE pg_stat_db_queries
(
database_id integer,
queryid bigint ,
query text ,
max_time double precision
);
TABLE pg_stat_history
(
…
database_id integer ,
…
queryid bigint ,
…
max_time double precision ,
…
);
Shaqadani waxay awood u siinaysaa tiro awoodo waxtar leh si loo habeeyo su'aalaha faylka log. Gaar ahaan:
Tilmaamaha #1 - Taariikhda Fulinta Weydiinta
Aad bay waxtar u leedahay in la bilaabo xallinta arrin wax qabad. Marka hore, bal u fiirso taariikhda— goorma ayuu gaabiska bilaabmay?
Kadib, sida caadiga ah, raadi sababaha dibadda. Waxaa laga yaabaa in culeyska keydka macluumaadka uu si fudud u kordhay, iyo su'aal gaar ah ma aha sababta.
Ku dar rikoor cusub miiska log_query
port_start = position('(' in ip_port);
port_end = position(')' in ip_port);
client_ip = substring( ip_port from 1 for port_start-1 );
client_port = substring( ip_port from port_start+1 for port_end-port_start-1 );
SELECT e.host , d.name , d.owner_pwd
INTO database_rec
FROM database d JOIN endpoint e ON e.id = d.endpoint_id
WHERE d.id = log_database_id ;
log_timepoint = to_timestamp(log_date||' '||log_time,'YYYY-MM-DD HH24-MI-SS');
log_duration = to_number(duration,'99999999999999999999D9999999999');
pos = position ('SELECT' in UPPER(sql_line) );
log_query = substring( sql_line from pos for LENGTH(sql_line));
log_query = regexp_replace(log_query,' +',' ','g');
log_query = regexp_replace(log_query,';+','','g');
log_query = trim(trailing ' ' from log_query);
RAISE NOTICE 'log_query=%',log_query ;
log_md5hash = md5( log_query::text );
--Explain execution plan--
EXECUTE 'SELECT dblink_connect(''LINK1'',''host='||database_rec.host||' dbname='||database_rec.name||' user=DATABASE password='||database_rec.owner_pwd||' '')';
log_explain_plan = ARRAY ( SELECT * FROM dblink('LINK1', 'EXPLAIN '||log_query ) AS t (plan text) );
log_plan_wo_costs = ARRAY ( SELECT * FROM dblink('LINK1', 'EXPLAIN ( COSTS FALSE ) '||log_query ) AS t (plan text) );
PERFORM dblink_disconnect('LINK1');
--------------------------
BEGIN
INSERT INTO log_query
(
query_md5hash ,
database_id ,
timepoint ,
duration ,
query ,
explained_plan ,
plan_md5hash ,
explained_plan_wo_costs ,
plan_hash_value ,
ip ,
port
)
VALUES
(
log_md5hash ,
log_database_id ,
log_timepoint ,
log_duration ,
log_query ,
log_explain_plan ,
md5(log_explain_plan::text) ,
log_plan_wo_costs ,
md5(log_plan_wo_costs::text),
client_ip ,
client_port
);
Tilmaamaha #2 - Keydi qorshooyinka fulinta weydiinta
Halkaa marka ay marayso, waxa laga yaabaa in ay soo baxdo faallo- caddayn- diidmo: “Laakiin mar hore ayaa si toos ah loo sharraxay"Haa, waa, laakiin maxay tahay macnaha haddii qorshaha fulinta lagu kaydiyo isla faylka log iyo si loo kaydiyo falanqayn dheeraad ah, waa inaad kala saartaa faylka log?
Anigu, si kastaba ha ahaatee, waxaan u baahanahay:
Marka hore: ku kaydi qorshaha fulinta shaxda adeegga ee xogta la socodka;
Marka labaad: inaad awood u yeelatid inaad is barbardhigto qorshayaasha fulinta, si aad isla markiiba u aragto in qorshaha fulinta weydiinta uu isbedelay.
Weydiin leh xuduudo fulineed oo gaar ah ayaa diyaar ah. Helitaanka iyo kaydinta qorshaheeda fulinta iyadoo la isticmaalayo SHARAX waa hawl fudud.
Intaa waxaa dheer, adigoo isticmaalaya tibaaxaha SHARAX (QIIMAHA BEENKA), waxaad heli kartaa qalfoofka qorshe, kaas oo loo isticmaali doono in lagu helo qiimaha xashiishka ee qorshaha, kaas oo gacan ka geysan doona falanqaynta xigta ee qorshaha fulinta isbeddelka taariikhda.
Hel template qorshaha fulinta
--Explain execution plan--
EXECUTE 'SELECT dblink_connect(''LINK1'',''host='||database_rec.host||' dbname='||database_rec.name||' user=DATABASE password='||database_rec.owner_pwd||' '')';
log_explain_plan = ARRAY ( SELECT * FROM dblink('LINK1', 'EXPLAIN '||log_query ) AS t (plan text) );
log_plan_wo_costs = ARRAY ( SELECT * FROM dblink('LINK1', 'EXPLAIN ( COSTS FALSE ) '||log_query ) AS t (plan text) );
PERFORM dblink_disconnect('LINK1');
Xulashada #3 - Isticmaalka diiwaanka su'aasha si loola socdo
Maaddaama cabbiraadaha waxqabadka aan lagu habeynin qoraalka codsiga, laakiin aqoonsigiisa, waxaad u baahan tahay inaad ku xirto codsiyada feylka log oo leh codsiyada cabbiraadaha waxqabadka la habeeyey.
Hagaag, ugu yaraan si loo helo wakhtiga saxda ah ee dhacdada waxqabadka.
Sidaa darteed, haddii dhacdo wax qabad ay ku dhacdo aqoonsiga codsiga, waxaa jiri doona xiriiriye codsi gaar ah oo leh qiyam gaar ah iyo waqtiga fulinta saxda ah iyo muddada codsiga. Macluumaadkan waxaa lagu soo celin karaa iyadoo la adeegsanayo aragtida oo keliya pg_stat_oraahyada - waa mamnuuc.
Soo hel su'aalaha weydiinta oo cusboonaysii diiwaanka ku jira miiska log_query
SELECT *
INTO log_query_rec
FROM log_query
WHERE query_md5hash = log_md5hash AND timepoint = log_timepoint ;
log_query_rec.query=regexp_replace(log_query_rec.query,';+','','g');
FOR pg_stat_history_rec IN
SELECT
queryid ,
query
FROM
pg_stat_db_queries
WHERE
database_id = log_database_id AND
queryid is not null
LOOP
pg_stat_query = pg_stat_history_rec.query ;
pg_stat_query=regexp_replace(pg_stat_query,'n+',' ','g');
pg_stat_query=regexp_replace(pg_stat_query,'t+',' ','g');
pg_stat_query=regexp_replace(pg_stat_query,' +',' ','g');
pg_stat_query=regexp_replace(pg_stat_query,'$.','%','g');
log_query_text = trim(trailing ' ' from log_query_rec.query);
pg_stat_query_text = pg_stat_query;
--SELECT log_query_rec.query like pg_stat_query INTO found_flag ;
IF (log_query_text LIKE pg_stat_query_text) THEN
found_flag = TRUE ;
ELSE
found_flag = FALSE ;
END IF;
IF found_flag THEN
UPDATE log_query SET queryid = pg_stat_history_rec.queryid WHERE query_md5hash = log_md5hash AND timepoint = log_timepoint ;
activity_string = ' updated queryid = '||pg_stat_history_rec.queryid||
' for log_query with id = '||log_query_rec.id
;
RAISE NOTICE '%',activity_string;
EXIT ;
END IF ;
END LOOP ;
Kadib
Farsamada la sharraxay ayaa ugu dambeyntii heshay codsiga , u oggolaanaya macluumaad dheeraad ah in la falanqeeyo marka la xalinayo shilalka waxqabadka su'aasha ee soo baxa.
Inkasta oo, dabcan, ra'yigayga shakhsi ahaaneed, algorithm ee xulashada iyo beddelka xajmiga qaybta la soo dejiyey ayaa weli u baahan shaqo. Dhibaatada weli laguma xallin kiiska guud. Waxay u badan tahay inay noqon doonto mid xiiso leh.
Laakiin taasi waa sheeko gabi ahaanba ka duwan...
Source: www.habr.com
