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authorBruce Momjian2004-10-26 17:28:27 +0000
committerBruce Momjian2004-10-26 17:28:27 +0000
commit780d66554de285afb1010b0c843f91fd1f2cd825 (patch)
tree81a6bc62bc4f2aa49adb48a8e803fedf1706013d /doc/FAQ_russian
parent83cd2d8b0f1af64846337dd9b34d8e362309bc92 (diff)
Update Russian FAQ.
Viktor Vislobokov
Diffstat (limited to 'doc/FAQ_russian')
-rw-r--r--doc/FAQ_russian79
1 files changed, 38 insertions, 41 deletions
diff --git a/doc/FAQ_russian b/doc/FAQ_russian
index 58fec5cab80..57a8b0cc944 100644
--- a/doc/FAQ_russian
+++ b/doc/FAQ_russian
@@ -1,7 +1,7 @@
Otvety na chasto zadavaemye voprosy po PostgreSQL
- Data poslednego obnovleniya: CHetverg 6 maya 23:28:03 EDT 2004
+ Data poslednego obnovleniya: Vtornik 31 avgusta 23:28:03 EDT 2004
Anglijskij variant soprovozhdaet: Bryus Mom'yan (Bruce Momjian)
(pgman@candle.pha.pa.us)
@@ -61,6 +61,7 @@
3.9) CHto nahoditsya v kataloge pgsql_tmp?
3.10) Pochemu neobhodimo delat' dump i restore pri obnovlenii vypuskov
PostgreSQL?
+ 3.11) Kakoe komp'yuternoe "zhelezo" ya dolzhen ispol'zovat'?
Voprosy `ekspluatacii
@@ -204,29 +205,10 @@
1.4) Suschestvuyut li versii perenesennye ne na Unix sistemy?
- Klient
-
- Dlya zapuska na platformah MS Windows vozmozhna kompilyaciya C
- biblioteki libpq, psql, drugih interfesov i klientskih prilozhenij. V
- `etom sluchae, klient zapuskaetsya na MS Windows i svyazyvaetsya po
- TCP/IP s serverom, zapuschennym na odnoj iz podderzhivaemyh Unix
- platform. V distributiv vklyuchaetsya fajl win32.mak dlya togo, chtoby
- mozhno bylo provesti sborku biblioteki libpq i psql dlya Win32.
- PostgreSQL takzhe rabotaet cherez ODBC.
-
- Server
-
- Server BD mozhet byt' zapuschen na Windows NT i Win2k, ispol'zuya
- biblioteku Cygwin, razrabotannuyu kompaniej Cygnus dlya perenosa
- programmnogo obespecheniya Unix v NT. Smotrite pgsql/doc/FAQ_MSWIN v
- distributive ili MS Windows FAQ na
- http://www.PostgreSQL.org/docs/faqs/text/FAQ_MSWIN.
-
- PostgreSQL, sportirovannyj special'no dlya MS Win NT/2000/XP v
- nastoyaschij moment nachal rabotat'. Podrobnosti tekuschego
- sostoyaniya PostgreSQL dlya Windows smotrite na
- http://techdocs.postgresql.org/guides/Windows i
- http://momjian.postgresql.org/main/writings/pgsql/win32.html.
+ Nachinaya s versii 8.0, PostgreSQL bez vsyakih uhischrenij rabotaet na
+ operacionnyh sistemah Microsoft Windows, osnovannyh na NT, takih kak
+ Win2000, WinXP i Win2003. Paket installyatora dostupen po adresu
+ http://pgfoundry.org/projects/pginstaller.
Takzhe suschestvuet versiya sportirovannaya pod Novell Netware 6 na
http://forge.novell.com.
@@ -287,7 +269,7 @@
1.7) Kakaya poslednyaya versiya?
- Poslednij vypusk PostgreSQL - `eto versiya 7.4.2
+ Poslednij vypusk PostgreSQL - `eto versiya 7.4.5
My planiruem vypuskat' novye versii kazhdye 6-8 mesyacev.
@@ -563,11 +545,10 @@
3.5) Kak mne upravlyat' soedineniyami s drugih komp'yuterov?
Po umolchaniyu, PostgreSQL razreshaet tol'ko soedineniya na lokal'noj
- mashine cherez sokety domena Unix. Drugie mashiny ne smogut
- podklyuchit'sya k baze poka ne budet vklyuchena opciya tcpip_sockets v
- postgresql.conf i poka ne budet razreshena host-avtorizaciya v fajle
- $PGDATA/pg_hba.conf. `Eti dejstviya delayut vozmozhnymi TCP/IP
- soedineniya.
+ mashine cherez sokety domena Unix ili TCP/IP soedineniya. Drugie
+ mashiny ne smogut podklyuchit'sya k baze poka vy ne izmenite
+ listen_addresses v postgresql.conf i poka ne budet razreshena
+ host-avtorizaciya v fajle $PGDATA/pg_hba.conf.
3.6) Kakie nastrojki mne nuzhno sdelat' dlya uluchsheniya
proizvoditel'nosti?
@@ -714,6 +695,18 @@
provedeniya obnovleniya mozhet byt' ispol'zovan scenarij pg_upgrade
bez ispol'zovaniya dump/restore. Kommentarii k vypusku govorit kogda
mozhno ispol'zovat' pg_upgrade dlya `etogo vypuska.
+
+ 3.11) Kakoe komp'yuternoe "zhelezo" ya dolzhen ispol'zovat'?
+
+ Poskol'ku "zhelezo" personal'nyh komp'yuterov yavlyaetsya naibolee
+ sovmestimym, lyudi sklonny verit', chto takoe "zhelezo" imeet
+ odinakovoe kachestvo. `Eto ne tak. Pamyat' ECC, SCSI i kachestvennye
+ materinskie platy yavlyayutsya bolee nadiozhnymi i imeyut bolee
+ luchshuyu proizvoditel'nost', chem menee dorogoe "zhelezo". PostgreSQL
+ budet rabotat' na lyubom "zheleze", no esli dlya vas vazhny
+ nadiozhnost' i proizvoditel'nost', to s vashej storony budet mudro
+ postavit' sootvetstvuyuschee "zhelezo". Obsudit' raznoe "zhelezo"
+ mozhno v nashih spiskah rassylki.
_________________________________________________________________
Voprosy `ekspluatacii
@@ -813,23 +806,23 @@ a
srednem, sostavlyaet 20 bajt. Razmer prostogo fajla sostavit 2.8 MB.
Razmer bazy PostgreSQL, soderzhaschej `eti zhe dannye sostavit
priblizitel'no 6.4 MB iz kotoryh:
- 36 bajt: na kazhdyj zagolovok zapisi (priblizitel'no)
+ 32 bajt: na kazhdyj zagolovok zapisi (priblizitel'no)
+ 24 bajta: odno pole s celochislennym tipom i odno tekstovoe pole
+ 4 bajta: ukazatel' na stranice dlya vsej zapisi
----------------------------------------
- 64 bajt na zapis'
+ 60 bajt na zapis'
Razmer stranicy dannyh v PostgreSQL sostavlyaet 8192 bajt (8 KB), tak chto:
8192 bajt na stranicu
- --------------------- = 128 zapisej na stranicu BD (s okrugleniem)
- 64 bajta na zapis'
+ --------------------- = 136 zapisej na stranicu BD (okruglionno)
+ 60 bajt na zapis'
100000 strok dannyh
- ----------------------- = 782 stranicy v BD
+ ----------------------- = 735 stranic v BD (okruglionno)
128 zapisej na stranicu
- 782 stranicy BD * 8192 bajt na stranicu = 6,406,144 bajt (6.4 MB)
+ 735 stranic BD * 8192 bajt na stranicu = 6,021,120 bajt (6 MB)
Indeksy ne trebuyut tak mnogo, no poskol'ku oni sozdayutsya dlya
bol'shogo kolichestva dannyh, oni takzhe mogut byt' veliki.
@@ -902,6 +895,10 @@ a
opisyvayutsya v sekcii 4.12.
* Vo vremya initdb dolzhna ispol'zovat'sya lokal' po umolchaniyu C.
+ V vypuskah do versii 8.0, indeksy chasto nel'zya bylo ispol'zovat',
+ esli tipy dannyh tochno ne sovpadali s indeksnymi tipami kolonok. `Eto
+ osobenno kasalos' int2, int8 i numeric indeksov kolonok.
+
4.9) Kak posmotret' na to, kak optimizator vypolnyaet moj zapros?
Smotrite stranicu rukovodstva posvyaschennuyu EXPLAIN.
@@ -1085,11 +1082,11 @@ t' null-bajt bez opaski)
oblasti, kotorye ispol'zuyutsya vsemi vsemi bazami dannyh. Esli vy
hotite izmenit' OID na kakoe-libo drugoe znachenie ili esli vy hotite
sozdat' kopiyu tablicy s takimizhe OID, to `eto mozhno sdelat' tak:
- CREATE TABLE new_table(old_oid oid, mycol int);
- SELECT old_oid, mycol INTO new FROM old;
- COPY new TO '/tmp/pgtable';
- DELETE FROM new;
- COPY new WITH OIDS FROM '/tmp/pgtable';
+ CREATE TABLE new_table(mycol int);
+ SELECT oid AS old_oid, mycol INTO tmp_table FROM old_table;
+ COPY tmp_table TO '/tmp/pgtable';
+ COPY new_table WITH OIDS FROM '/tmp/pgtable';
+ DROP TABLE tmp_table;
OID hranitsya kak 4-h bajtnoe celoe i ne mozhet prevyshat' znachenie v
4 milliarda. Odnako, esche nikto ne soobschil o tom, chto takoe