PostgreSQL http://postgresmen.ru
PostgreSQL ; BSD-; , , ACID ; ;
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
PostgreSQL : email:[email protected]
xmpp:[email protected] , web:http://postgresmen.ru
; : -:
http://wiki.postgresmen.ru/index.php/-_PostgreSQL;http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
http://wiki.postgresql.org/wiki/Development_information;
PostgreSQL : wikipedia (.); : , , , ;
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
:tikaonline.de
PostgreSQL : , M-S, M-M , , PL/Proxy, GridSQL.
:tikaonline.de
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
1. 2.
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
, RAID, , , postgresql.conf
? ( 0)
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
?
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
, ! ( )
: contrib/pgbench, bonnie++ , , web-: ZABBIX, + Cacti/Nagios,
Staplr by Gavin Roy SQL-: pgFouine; pg_stat_*, reads/hits,
phpPgAdmin
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
?
!
PostgreSQLHardwarePerformanceTuning byBruceMomjian(.),
Highload2007
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
DBA
8.28.3
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
DBA
pgBouncer()
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
DBA
RAM:
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
DBA
: LA
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
*FreeBSDnode
: 1: !shared_buffers work_mem max_connections
effective_cache_size
VACUUM, FSM, , checkpoints 187 3- (Josh Berkus)
: ,
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 2: PgBouncer
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 3 ( ):statement_timeout=90s
:SETstatement_timeoutTO0;
ALTERUSERmaintanance_userSETstatement_timeoutTO0;
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 3: SELECT datname, CASE WHEN blks_read = 0 THEN 0 ELSE
blks_hit / blks_read END AS ratio FROM pg_stat_database; SELECT
indexrelname, idx_tup_read, idx_tup_fetch, (idx_tup_read -
idx_tup_fetch), CASE WHEN idx_tup_read = 0 THEN 0 ELSE
(idx_tup_read::float4 idx_tup_fetch) / idx_tup_read END as r FROM
pg_stat_user_indexes ORDER BY r desc;
.....
(,,..)http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
:tikaonline.de
, SQL-, , , ,
? ( 0)
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
?
!http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 1. , : , , , (, hit/read), EXPLAIN ANALYZE; 2. PgFouine
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
PgFouine [] :
. Queries that took up the most time (N), , > 1h !
, ;
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
PgFouine
80-90% ? ;-)
SQL-; TPS-
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
PgFouine
VACUUMVERBOSE FSM /, Tsung:
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
PgFouinepostgresql.conf: log_min_duration_statement=100ms : !
1s, 100ms pgFouine PHP (sic!). ,
RAM.http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 1: PostgreSQL
B-Tree, GiST, R-Tree, GIN; : btree 2 , : btree_gist+rtree,
rtree+ btree_gist+GiST(.) .. 1 (!) :
CREATEINDEXidxONt1(substr(name,6));
CREATEINDEXidsONt1WHEREstatus=1;
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 2:
OUTER (LEFT/RIGHT) JOIN GROUP BY, DISTINCT, DISTINCT ON, UNION (
ALL) ... OFFSET 100000; SELECT COUNT(1) FROM t1 WHERE ... AND ...
AND ...;
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 2: . ( ): 1: count() ( : 1000000 ): ( EXPLAINSELECT...); 2:
OFFSET: , ( GMail), ,
.http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
: 3:
SQL-; ; : Slony-I ( ), SkyTools, PL/Proxy, GridSQL.
: ! Skype;
myYearbook.com.http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
30 .
?) ; ) 19:00 PostgreSQL-; ) .
email:[email protected]:[email protected]
web:http://postgresmen.ru
http://samokhvalov.com/files/20081006_highload2008_postgresql.pdf
