{"id":40503,"date":"2026-02-27T12:00:41","date_gmt":"2026-02-27T09:00:41","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/wordpress-siteleri-icin-mysql-explain-planini-anlamak-ve-okumak\/"},"modified":"2026-02-27T12:00:41","modified_gmt":"2026-02-27T09:00:41","slug":"wordpress-siteleri-icin-mysql-explain-planini-anlamak-ve-okumak","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/wordpress-siteleri-icin-mysql-explain-planini-anlamak-ve-okumak\/","title":{"rendered":"WordPress Siteleri \u0130\u00e7in MySQL EXPLAIN Plan\u0131n\u0131 Anlamak ve Okumak"},"content":{"rendered":"

WordPress Siteleri \u0130\u00e7in MySQL EXPLAIN Plan\u0131n\u0131 Anlamak ve Okumak<\/h2>\n

WordPress sitelerinin performans\u0131, b\u00fcy\u00fck \u00f6l\u00e7\u00fcde alt\u0131nda yatan MySQL veritaban\u0131n\u0131n verimli \u00e7al\u0131\u015fmas\u0131na ba\u011fl\u0131d\u0131r. Yava\u015f y\u00fcklenen sayfalar, tak\u0131lan y\u00f6netici panelleri veya zaman a\u015f\u0131m\u0131na u\u011frayan sorgular, genellikle k\u00f6t\u00fc optimize edilmi\u015f veritaban\u0131 sorgular\u0131n\u0131n bir sonucudur. \u0130\u015fte tam bu noktada MySQL’in EXPLAIN<\/code> komutu devreye girer. Bu makale, EXPLAIN<\/code> \u00e7\u0131kt\u0131s\u0131n\u0131 nas\u0131l okuyaca\u011f\u0131n\u0131z\u0131, yorumlayaca\u011f\u0131n\u0131z\u0131 ve WordPress sitenizin veritaban\u0131 performans\u0131n\u0131 art\u0131rmak i\u00e7in nas\u0131l kullanaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayacakt\u0131r.<\/p>\n

EXPLAIN Nedir ve Neden \u00d6nemlidir?<\/h3>\n

EXPLAIN<\/code>, MySQL’in bir sorguyu nas\u0131l y\u00fcr\u00fctece\u011fini g\u00f6steren bir ara\u00e7t\u0131r. Bir sorguyu \u00e7al\u0131\u015ft\u0131rmadan \u00f6nce, veritaban\u0131 motorunun o sorguyu hangi yollarla i\u015fleyece\u011fini, hangi indeksleri kullanaca\u011f\u0131n\u0131, ka\u00e7 sat\u0131r okuyaca\u011f\u0131n\u0131 ve olas\u0131 performans darbo\u011fazlar\u0131n\u0131 g\u00f6rselle\u015ftirmemizi sa\u011flar. WordPress gibi dinamik ve veritaban\u0131 yo\u011fun uygulamalar i\u00e7in EXPLAIN<\/code> \u00e7\u0131kt\u0131s\u0131n\u0131 anlamak, performans optimizasyonunda kritik bir ad\u0131md\u0131r.<\/p>\n

Performans Sorunlar\u0131n\u0131 Te\u015fhis Etme<\/h4>\n

EXPLAIN<\/code> olmadan, bir sorgunun neden yava\u015f \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak olduk\u00e7a zordur. \u00c7\u0131kt\u0131, sorgunun hangi a\u015famas\u0131n\u0131n zaman ald\u0131\u011f\u0131n\u0131, gereksiz taramalar yap\u0131p yapmad\u0131\u011f\u0131n\u0131 veya do\u011fru indeksleri kullan\u0131p kullanmad\u0131\u011f\u0131n\u0131 g\u00f6stererek, sorunun k\u00f6k nedenini bulman\u0131za yard\u0131mc\u0131 olur. Bu sayede, “deneme yan\u0131lma” y\u00f6nteminden kurtulup, do\u011frudan sorunu \u00e7\u00f6zmeye odaklanabilirsiniz.<\/p>\n

WordPress Ba\u011flam\u0131nda EXPLAIN<\/h4>\n

WordPress, wp_posts<\/code>, wp_postmeta<\/code>, wp_options<\/code>, wp_users<\/code>, wp_termmeta<\/code>, wp_terms<\/code>, wp_term_relationships<\/code> ve wp_term_taxonomy<\/code> gibi bir\u00e7ok tabloyu yo\u011fun bir \u015fekilde kullan\u0131r. Eklentiler ve temalar da kendi \u00f6zel tablolar\u0131n\u0131 ekleyebilir. Bu tablolar \u00fczerindeki sorgular, sitenizin h\u0131z\u0131n\u0131 do\u011frudan etkiler. EXPLAIN<\/code> kullanarak, pop\u00fcler eklentilerin veya teman\u0131z\u0131n olu\u015fturdu\u011fu karma\u015f\u0131k sorgular\u0131n performans\u0131n\u0131 analiz edebilir ve iyile\u015ftirme potansiyeli olan alanlar\u0131 belirleyebilirsiniz.<\/p>\n

EXPLAIN Nas\u0131l Kullan\u0131l\u0131r? (Temel S\u00f6zdizimi)<\/h4>\n

EXPLAIN<\/code> komutunu kullanmak olduk\u00e7a basittir. Optimize etmek istedi\u011finiz herhangi bir SELECT<\/code>, INSERT<\/code>, UPDATE<\/code> veya DELETE<\/code> sorgusunun ba\u015f\u0131na EXPLAIN<\/code> anahtar kelimesini eklemeniz yeterlidir.<\/p>\n

EXPLAIN SELECT * FROM wp_posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_date DESC LIMIT 10;\n<\/pre>\n
<\/code><\/p>\n
Bu komut, sorguyu \u00e7al\u0131\u015ft\u0131rmaz, sadece MySQL'in bu sorguyu nas\u0131l y\u00fcr\u00fctece\u011fine dair bir plan sunar.<\/p>\n
EXPLAIN \u00c7\u0131kt\u0131s\u0131n\u0131n Temel S\u00fctunlar\u0131<\/h3>\n
EXPLAIN<\/code> \u00e7\u0131kt\u0131s\u0131, her bir sorgu b\u00f6l\u00fcm\u00fc i\u00e7in bir sat\u0131r i\u00e7eren bir tablo \u015feklinde sunulur. Her s\u00fctun, sorgunun y\u00fcr\u00fctme plan\u0131n\u0131n belirli bir y\u00f6n\u00fcn\u00fc a\u00e7\u0131klar. \u0130\u015fte en \u00f6nemli s\u00fctunlar ve anlamlar\u0131:<\/p>\n
id<\/code>, select_type<\/code>, table<\/code><\/h4>\n
    \n
  • id<\/code><\/b>: Sorgu i\u00e7indeki SELECT ifadelerinin s\u0131ras\u0131n\u0131 g\u00f6sterir. Ayn\u0131 id<\/code> de\u011ferine sahip sat\u0131rlar, sorgunun ayn\u0131 a\u015famas\u0131nda y\u00fcr\u00fct\u00fclen b\u00f6l\u00fcmleri temsil eder.<\/li>\n
  • select_type<\/code><\/b>: SELECT sorgusunun tipini belirtir. \u00d6nemli tipler \u015funlard\u0131r:\n
      \n
    • SIMPLE<\/code>: Basit bir SELECT sorgusu (JOIN veya alt sorgu yok).<\/li>\n
    • PRIMARY<\/code>: En d\u0131\u015ftaki SELECT (JOIN'ler varsa).<\/li>\n
    • SUBQUERY<\/code>: Bir alt sorgudaki ilk SELECT.<\/li>\n
    • DERIVED<\/code>: Bir FROM maddesindeki alt sorgunun sonucu (ge\u00e7ici tablo olu\u015fturulur).<\/li>\n
    • UNION<\/code>: Bir UNION i\u00e7indeki ikinci veya sonraki SELECT.<\/li>\n
    • DEPENDENT SUBQUERY<\/code>: D\u0131\u015f sorguya ba\u011f\u0131ml\u0131 bir alt sorgu.<\/li>\n<\/ul>\n<\/li>\n
    • table<\/code><\/b>: Sorgunun \u00e7al\u0131\u015ft\u0131\u011f\u0131 tablo ad\u0131n\u0131 g\u00f6sterir. Ge\u00e7ici tablolar veya t\u00fcretilmi\u015f tablolar i\u00e7in de \u00f6zel isimler g\u00f6r\u00fcnebilir.<\/li>\n<\/ul>\n
      type<\/code> (En Kritik S\u00fctun)<\/h4>\n
      type<\/code> s\u00fctunu, MySQL'in tablodaki sat\u0131rlar\u0131 nas\u0131l buldu\u011funu g\u00f6sterir ve sorgu performans\u0131n\u0131n en \u00f6nemli g\u00f6stergelerinden biridir. De\u011ferler, en iyiden en k\u00f6t\u00fcye do\u011fru s\u0131ralan\u0131r:<\/p>\n
      system > const > eq_ref > ref > range > index > ALL\n<\/pre>\n
      <\/code><\/p>\n
      Bu tipleri daha detayl\u0131 inceleyece\u011fiz.<\/p>\n
      possible_keys<\/code>, key<\/code>, key_len<\/code><\/h4>\n
        \n
      • possible_keys<\/code><\/b>: MySQL'in sorguyu h\u0131zland\u0131rmak i\u00e7in kullanabilece\u011fi olas\u0131 indeksleri listeler.<\/li>\n
      • key<\/code><\/b>: MySQL'in sorguyu y\u00fcr\u00fctmek i\u00e7in asl\u0131nda se\u00e7ti\u011fi indeksi g\u00f6sterir. E\u011fer NULL<\/code> ise, hi\u00e7bir indeks kullan\u0131lmam\u0131\u015ft\u0131r.<\/li>\n
      • key_len<\/code><\/b>: MySQL'in se\u00e7ilen indeksi kullan\u0131rken ka\u00e7 bayt kulland\u0131\u011f\u0131n\u0131 g\u00f6sterir. Bu, bile\u015fik indekslerde hangi s\u00fctunlar\u0131n kullan\u0131ld\u0131\u011f\u0131n\u0131 anlamak i\u00e7in faydal\u0131d\u0131r.<\/li>\n<\/ul>\n
        ref<\/code>, rows<\/code>, filtered<\/code><\/h4>\n
          \n
        • ref<\/code><\/b>: key<\/code> taraf\u0131ndan belirtilen indeksle kar\u015f\u0131la\u015ft\u0131r\u0131lan s\u00fctunlar\u0131 veya sabitleri g\u00f6sterir. Genellikle const<\/code> veya bir tablo ad\u0131 ve s\u00fctun ad\u0131 i\u00e7erir.<\/li>\n
        • rows<\/code><\/b>: MySQL'in sorguyu tamamlamak i\u00e7in taramay\u0131 tahmin etti\u011fi sat\u0131r say\u0131s\u0131n\u0131 g\u00f6sterir. Bu de\u011fer ne kadar d\u00fc\u015f\u00fckse, sorgu o kadar verimlidir.<\/li>\n
        • filtered<\/code><\/b>: Tablo sat\u0131rlar\u0131n\u0131n tahmini y\u00fczdesini g\u00f6sterir ki bu sat\u0131rlar, bir sonraki tabloya veya istemciye g\u00f6nderilmeden \u00f6nce tablo ko\u015fullar\u0131yla filtrelenecektir. Y\u00fcksek bir filtered<\/code> de\u011feri, MySQL'in \u00e7ok fazla sat\u0131r\u0131 okuyup sonra filtreledi\u011fini g\u00f6sterir.<\/li>\n<\/ul>\n
          Extra<\/code> (Ek Bilgiler)<\/h4>\n
          Extra<\/code> s\u00fctunu, MySQL'in sorgu y\u00fcr\u00fctme hakk\u0131nda ek bilgiler sa\u011flad\u0131\u011f\u0131 kritik bir aland\u0131r. Burada g\u00f6r\u00fcnen baz\u0131 ifadeler, ciddi performans sorunlar\u0131n\u0131n g\u00f6stergesi olabilir.<\/p>\n
          type<\/code> S\u00fctununu Anlamak: Performans\u0131n Kalbi<\/h3>\n
          type<\/code> s\u00fctunu, bir sorgunun ne kadar iyi optimize edildi\u011fini anlamak i\u00e7in en \u00f6nemli g\u00f6stergedir. \u0130\u015fte farkl\u0131 type<\/code> de\u011ferleri ve anlamlar\u0131:<\/p>\n
          system<\/code>, const<\/code>, eq_ref<\/code> (\u0130deal Tipler)<\/h4>\n
            \n
          • system<\/code><\/b>: Tabloda sadece bir sat\u0131r varsa (bir sistem tablosu gibi). Bu en h\u0131zl\u0131 tiptir.<\/li>\n
          • const<\/code><\/b>: Sorgu sabit bir de\u011ferle e\u015fle\u015fen tek bir sat\u0131r\u0131 okudu\u011funda kullan\u0131l\u0131r. Genellikle birincil anahtar veya benzersiz bir indeks kullan\u0131ld\u0131\u011f\u0131nda ortaya \u00e7\u0131kar. \u00c7ok h\u0131zl\u0131d\u0131r.<\/li>\n
          • eq_ref<\/code><\/b>: JOIN'lerde, \u00f6nceki tablodan gelen her sat\u0131r i\u00e7in ge\u00e7erli tablodan sadece bir sat\u0131r okundu\u011funda kullan\u0131l\u0131r. Birincil anahtar veya benzersiz indeks \u00fczerinde bir JOIN oldu\u011funda g\u00f6r\u00fcl\u00fcr. \u00c7ok iyidir.<\/li>\n<\/ul>\n
            ref<\/code>, range<\/code> (\u0130yi Tipler)<\/h4>\n
              \n
            • ref<\/code><\/b>: Bir indeks kullan\u0131larak e\u015fle\u015fen t\u00fcm sat\u0131rlar\u0131 bulur. eq_ref<\/code>'ten farkl\u0131 olarak, birden fazla sat\u0131r e\u015fle\u015febilir. Birincil anahtar veya benzersiz olmayan indeksler \u00fczerinde kullan\u0131l\u0131r. \u0130yi bir performanst\u0131r.<\/li>\n
            • range<\/code><\/b>: Belirli bir aral\u0131ktaki sat\u0131rlar\u0131 almak i\u00e7in bir indeks kulland\u0131\u011f\u0131nda kullan\u0131l\u0131r (\u00f6rne\u011fin, WHERE id BETWEEN 10 AND 20<\/code> veya WHERE post_date > '2023-01-01'<\/code>). \u0130yi bir performanst\u0131r.<\/li>\n<\/ul>\n
              index<\/code>, ALL<\/code> (Ka\u00e7\u0131n\u0131lmas\u0131 Gereken Tipler)<\/h4>\n
                \n
              • index<\/code><\/b>: MySQL, indeksin tamam\u0131n\u0131 tarayarak sorguyu y\u00fcr\u00fct\u00fcr. Bu, ALL<\/code>'dan daha iyidir \u00e7\u00fcnk\u00fc veri dosyas\u0131 yerine indeks dosyas\u0131 taran\u0131r, bu da genellikle daha k\u00fc\u00e7\u00fckt\u00fcr. Ancak yine de t\u00fcm indeksi taramak maliyetlidir. ORDER BY<\/code> veya GROUP BY<\/code> gibi durumlarda, indeks s\u0131ralamas\u0131n\u0131 kullanmak i\u00e7in g\u00f6r\u00fclebilir.<\/li>\n
              • ALL<\/code><\/b>: MySQL, sorguyu tamamlamak i\u00e7in tablonun tamam\u0131n\u0131 tarar. Bu, en k\u00f6t\u00fc performans g\u00f6stergesidir ve b\u00fcy\u00fck tablolar i\u00e7in kesinlikle ka\u00e7\u0131n\u0131lmal\u0131d\u0131r. Genellikle uygun indekslerin eksikli\u011finden kaynaklan\u0131r.<\/li>\n<\/ul>\n
                Di\u011fer Tipler<\/h4>\n
                  \n
                • fulltext<\/code>: FULLTEXT indeksleri kullan\u0131ld\u0131\u011f\u0131nda.<\/li>\n
                • ref_or_null<\/code>: ref<\/code> gibi, ancak NULL<\/code> de\u011ferlerini de i\u00e7erir.<\/li>\n
                • unique_subquery<\/code>, index_subquery<\/code>, index_merge<\/code>: Daha karma\u015f\u0131k alt sorgu veya indeks birle\u015ftirme senaryolar\u0131nda g\u00f6r\u00fcl\u00fcr.<\/li>\n<\/ul>\n
                  Extra<\/code> S\u00fctunundaki Kritik \u0130fadeler<\/h3>\n
                  Extra<\/code> s\u00fctunu, sorgu optimizasyonunda \u00f6nemli ipu\u00e7lar\u0131 sunar. Baz\u0131 ifadeler, sorgunuzun ciddi \u015fekilde optimize edilmesi gerekti\u011fini g\u00f6sterir.<\/p>\n
                  Using filesort<\/code><\/h4>\n
                  Bu ifade, MySQL'in sonu\u00e7lar\u0131 s\u0131ralamak i\u00e7in ge\u00e7ici bir dosya veya bellek alan\u0131 kullanmas\u0131 gerekti\u011fi anlam\u0131na gelir. Bu, \u00f6zellikle b\u00fcy\u00fck veri k\u00fcmelerinde \u00e7ok yava\u015f olabilir. Genellikle ORDER BY<\/code> veya GROUP BY<\/code> ifadeleri i\u00e7in uygun bir indeksin olmamas\u0131ndan kaynaklan\u0131r. Bu ifadeyi g\u00f6rd\u00fc\u011f\u00fcn\u00fczde, s\u0131ralama i\u00e7in bir indeks eklemeyi d\u00fc\u015f\u00fcnmelisiniz.<\/p>\n
                  Using temporary<\/code><\/h4>\n
                  MySQL'in sorguyu i\u015flemek i\u00e7in ge\u00e7ici bir tablo olu\u015fturmas\u0131 gerekti\u011fi anlam\u0131na gelir. Bu, genellikle GROUP BY<\/code> veya DISTINCT<\/code> i\u015flemleriyle birle\u015fen ORDER BY<\/code> ifadelerinde veya karma\u015f\u0131k JOIN'lerde g\u00f6r\u00fcl\u00fcr. Ge\u00e7ici tablolar diskte olu\u015fturulursa \u00e7ok yava\u015f olabilir. M\u00fcmk\u00fcn oldu\u011funca ka\u00e7\u0131n\u0131lmal\u0131d\u0131r.<\/p>\n
                  Using where<\/code><\/h4>\n
                  Bu ifade, MySQL'in WHERE<\/code> ko\u015fulunu kullanarak e\u015fle\u015fen sat\u0131rlar\u0131 filtreledi\u011fini g\u00f6sterir. Bu ifade tek ba\u015f\u0131na bir sorun de\u011fildir; asl\u0131nda \u00e7o\u011fu sorguda beklenen bir durumdur. Ancak, type: ALL<\/code> ile birlikte Using where<\/code> g\u00f6r\u00fcyorsan\u0131z, bu, tablonun tamam\u0131n\u0131n taran\u0131p sonra filtrelendi\u011fi anlam\u0131na gelir ki bu da k\u00f6t\u00fc bir performanst\u0131r.<\/p>\n
                  Using index<\/code>, Using index condition<\/code><\/h4>\n
                    \n
                  • Using index<\/code><\/b>: MySQL'in sorguyu sadece indeks a\u011fac\u0131ndaki bilgileri kullanarak tamamlayabildi\u011fini g\u00f6sterir. Bu, \"covering index\" olarak bilinir ve veri dosyas\u0131na eri\u015fmeye gerek kalmad\u0131\u011f\u0131 i\u00e7in \u00e7ok verimlidir. \u0130deal bir durumdur.<\/li>\n
                  • Using index condition<\/code><\/b>: MySQL'in indeksi kullanarak bir WHERE<\/code> ko\u015fulunu filtreledi\u011fini g\u00f6sterir. Bu, MySQL 5.6 ve sonraki s\u00fcr\u00fcmlerde tan\u0131t\u0131lan bir optimizasyondur ve Using where<\/code>'den daha iyidir \u00e7\u00fcnk\u00fc filtreleme indeks d\u00fczeyinde yap\u0131l\u0131r.<\/li>\n<\/ul>\n
                    Using join buffer<\/code><\/h4>\n
                    MySQL'in JOIN i\u015flemleri i\u00e7in bir arabellek kulland\u0131\u011f\u0131n\u0131 g\u00f6sterir. Bu, JOIN'lerin indekslenmemi\u015f s\u00fctunlar \u00fczerinde yap\u0131ld\u0131\u011f\u0131nda veya \u00e7ok say\u0131da sat\u0131r birle\u015ftirildi\u011finde g\u00f6r\u00fclebilir. Performans sorunlar\u0131na yol a\u00e7abilir ve JOIN ko\u015fullar\u0131 i\u00e7in indeks eklenerek genellikle \u00f6nlenebilir.<\/p>\n
                    WordPress Sorgular\u0131nda EXPLAIN Kullan\u0131m\u0131<\/h3>\n
                    WordPress'in dinamik yap\u0131s\u0131, bir\u00e7ok farkl\u0131 sorgu t\u00fcr\u00fcn\u00fc beraberinde getirir. \u0130\u015fte baz\u0131 yayg\u0131n WordPress senaryolar\u0131nda EXPLAIN<\/code>'i nas\u0131l uygulayabilece\u011finiz:<\/p>\n
                    wp_posts<\/code> ve wp_postmeta<\/code> Sorgular\u0131<\/h4>\n
                    WordPress'in kalbi olan wp_posts<\/code> tablosu, t\u00fcm yaz\u0131lar\u0131, sayfalar\u0131 ve \u00f6zel yaz\u0131 tiplerini i\u00e7erir. wp_postmeta<\/code> ise bu yaz\u0131larla ilgili \u00f6zel alanlar\u0131 saklar.<\/p>\n
                    -- Belirli bir yaz\u0131 tipindeki yay\u0131nlanm\u0131\u015f yaz\u0131lar\u0131 getiren bir sorgu\nEXPLAIN SELECT ID, post_title, post_date FROM wp_posts WHERE post_type = 'post' AND post_status = 'publish' ORDER BY post_date DESC LIMIT 0, 10;\n\n-- Bir meta anahtar\u0131na g\u00f6re filtreleme yapan bir sorgu\nEXPLAIN SELECT p.ID, p.post_title FROM wp_posts p\nINNER JOIN wp_postmeta pm ON p.ID = pm.post_id\nWHERE p.post_type = 'product' AND p.post_status = 'publish'\nAND pm.meta_key = '_price' AND pm.meta_value > '100'\nORDER BY p.post_date DESC LIMIT 0, 10;\n<\/pre>\n
                    <\/code>
                    \nBu sorgularda type<\/code> s\u00fctununu ve Extra<\/code> s\u00fctunundaki Using filesort<\/code> gibi ifadeleri kontrol edin. \u00d6zellikle wp_postmeta<\/code> tablosu \u00fczerinde meta_key<\/code> ve meta_value<\/code> s\u00fctunlar\u0131 i\u00e7in indeksler genellikle gereklidir.<\/p>\n
                    wp_options<\/code> ve Otomatik Y\u00fckleme<\/h4>\n
                    wp_options<\/code> tablosu, sitenizin ayarlar\u0131n\u0131 saklar. \u00d6zellikle autoload = 'yes'<\/code> olan se\u00e7enekler, her sayfa y\u00fcklemesinde \u00e7a\u011fr\u0131l\u0131r. \u00c7ok fazla otomatik y\u00fcklenen se\u00e7enek, performans\u0131 d\u00fc\u015f\u00fcrebilir.<\/p>\n
                    EXPLAIN SELECT option_name, option_value FROM wp_options WHERE autoload = 'yes';\n<\/pre>\n
                    <\/code>
                    \nBu sorgu genellikle h\u0131zl\u0131d\u0131r, ancak autoload<\/code> s\u00fctununda indeks yoksa veya \u00e7ok fazla sat\u0131r varsa type: ALL<\/code> g\u00f6rebilirsiniz.<\/p>\n
                    Eklenti ve Tema Sorgular\u0131n\u0131 \u0130nceleme<\/h4>\n
                    Bir\u00e7ok eklenti ve tema, kendi karma\u015f\u0131k sorgular\u0131n\u0131 \u00e7al\u0131\u015ft\u0131r\u0131r. Yava\u015f bir eklentiyi veya temay\u0131 te\u015fhis etmek i\u00e7in, yava\u015f sorgu g\u00fcnl\u00fcklerini (slow query log) analiz ederek veya sorgu izleme eklentileri kullanarak \u015f\u00fcpheli sorgular\u0131 belirleyebilir ve ard\u0131ndan EXPLAIN<\/code> ile inceleyebilirsiniz.<\/p>\n
                    \u00d6rnek Bir WordPress Sorgusu ve EXPLAIN Analizi<\/h4>\n
                    Diyelim ki bir WordPress blogunda pop\u00fcler yaz\u0131lar\u0131 getiren bir sorgu var:<\/p>\n
                    SELECT p.ID, p.post_title, pm.meta_value AS views_count\nFROM wp_posts p\nINNER JOIN wp_postmeta pm ON p.ID = pm.post_id\nWHERE p.post_type = 'post' AND p.post_status = 'publish'\nAND pm.meta_key = 'post_views_count'\nORDER BY CAST(pm.meta_value AS UNSIGNED) DESC\nLIMIT 10;\n<\/pre>\n
                    <\/code>
                    \nBu sorgunun EXPLAIN<\/code> \u00e7\u0131kt\u0131s\u0131 muhtemelen wp_postmeta<\/code> tablosu i\u00e7in type: ALL<\/code> veya type: index<\/code> g\u00f6sterecek ve Extra<\/code> s\u00fctununda Using filesort<\/code> ve Using temporary<\/code> i\u00e7erecektir. Bunun nedeni:<\/p>\n
                      \n
                    • meta_key<\/code> \u00fczerinde indeks olsa bile meta_value<\/code>'nun string olmas\u0131 ve say\u0131sal s\u0131ralama i\u00e7in CAST<\/code> kullan\u0131lmas\u0131.<\/li>\n
                    • post_views_count<\/code> meta anahtar\u0131 i\u00e7in meta_value<\/code> \u00fczerinde indeks olmamas\u0131.<\/li>\n<\/ul>\n
                      \u0130yile\u015ftirme i\u00e7in wp_postmeta<\/code> tablosuna (meta_key, meta_value)<\/code> \u00fczerinde bir indeks eklemek ve post_views_count<\/code> meta de\u011ferlerini say\u0131sal olarak saklamak (meta_value<\/code> yerine ayr\u0131 bir s\u00fctunda) d\u00fc\u015f\u00fcn\u00fclebilir.<\/p>\n
                      Performans \u0130yile\u015ftirme Stratejileri<\/h3>\n
                      EXPLAIN<\/code> \u00e7\u0131kt\u0131s\u0131n\u0131 analiz ettikten sonra, performans sorunlar\u0131n\u0131 gidermek i\u00e7in \u00e7e\u015fitli stratejiler uygulayabilirsiniz.<\/p>\n
                      \u0130ndeksleme Stratejileri<\/h4>\n
                        \n
                      • Eksik \u0130ndeksleri Ekleyin<\/b>: type: ALL<\/code> veya type: index<\/code> g\u00f6rd\u00fc\u011f\u00fcn\u00fczde, WHERE<\/code> ve ORDER BY<\/code> ko\u015fullar\u0131ndaki s\u00fctunlar i\u00e7in indeksler eklemeyi d\u00fc\u015f\u00fcn\u00fcn.<\/li>\n
                      • Bile\u015fik \u0130ndeksler<\/b>: Birden fazla s\u00fctunu i\u00e7eren WHERE<\/code> veya ORDER BY<\/code> ko\u015fullar\u0131 i\u00e7in bile\u015fik indeksler (\u00f6rne\u011fin, (post_type, post_status, post_date)<\/code>) olu\u015fturun. \u0130ndeksleme s\u0131ras\u0131 \u00f6nemlidir.<\/li>\n
                      • Covering Index (Kapsay\u0131c\u0131 \u0130ndeks)<\/b>: E\u011fer SELECT<\/code> etti\u011finiz t\u00fcm s\u00fctunlar bir indeksin par\u00e7as\u0131ysa (Using index<\/code> g\u00f6r\u00fcrs\u00fcn\u00fcz), MySQL veri dosyas\u0131na gitmek zorunda kalmaz. Bu, \u00e7ok h\u0131zl\u0131d\u0131r.<\/li>\n
                      • Gereksiz \u0130ndeksleri Kald\u0131r\u0131n<\/b>: \u00c7ok fazla indeks, INSERT<\/code>, UPDATE<\/code>, DELETE<\/code> i\u015flemlerini yava\u015flatabilir. Kullan\u0131lmayan indeksleri periyodik olarak kontrol edin ve kald\u0131r\u0131n.<\/li>\n<\/ul>\n
                        Sorgu Optimizasyonu Teknikleri<\/h4>\n
                          \n
                        • SELECT *<\/code> Yerine Belirli S\u00fctunlar\u0131 Se\u00e7in<\/b>: Yaln\u0131zca ihtiyac\u0131n\u0131z olan s\u00fctunlar\u0131 se\u00e7mek, veri transferini azalt\u0131r ve bazen covering index kullan\u0131m\u0131na olanak tan\u0131r.<\/li>\n
                        • JOIN'leri \u0130yile\u015ftirin<\/b>: JOIN ko\u015fullar\u0131ndaki s\u00fctunlar\u0131n indeksli oldu\u011fundan emin olun. \u0130\u00e7 i\u00e7e ge\u00e7mi\u015f JOIN'lerden ka\u00e7\u0131n\u0131n.<\/li>\n
                        • Alt Sorgular\u0131 \u0130yile\u015ftirin<\/b>: Baz\u0131 alt sorgular JOIN<\/code>'lere d\u00f6n\u00fc\u015ft\u00fcr\u00fclerek daha verimli hale getirilebilir.<\/li>\n
                        • LIKE %value%<\/code> Kullan\u0131m\u0131ndan Ka\u00e7\u0131n\u0131n<\/b>: LIKE '%value%'<\/code> kullan\u0131m\u0131 indeksleri kullanamaz ve tam tablo taramas\u0131na yol a\u00e7ar. M\u00fcmk\u00fcnse LIKE 'value%'<\/code> kullan\u0131n veya FULLTEXT indeksleri de\u011ferlendirin.<\/li>\n<\/ul>\n
                          \u00d6nbellekleme ve Di\u011fer Y\u00f6ntemler<\/h4>\n
                          Veritaban\u0131 d\u00fczeyinde optimizasyonlar her zaman yeterli olmayabilir. WordPress siteniz i\u00e7in genel performans iyile\u015ftirmeleri de d\u00fc\u015f\u00fcnmelisiniz:<\/p>\n
                            \n
                          • Nesne \u00d6nbellekleme<\/b>: Redis veya Memcached gibi nesne \u00f6nbellekleme \u00e7\u00f6z\u00fcmleri, s\u0131k kullan\u0131lan sorgu sonu\u00e7lar\u0131n\u0131 \u00f6nbelle\u011fe alarak veritaban\u0131 y\u00fck\u00fcn\u00fc azalt\u0131r.<\/li>\n
                          • Sayfa \u00d6nbellekleme<\/b>: Tam sayfa \u00f6nbellekleme eklentileri (\u00f6rne\u011fin WP Rocket, LiteSpeed Cache) statik HTML kopyalar\u0131n\u0131 sunarak veritaban\u0131 sorgular\u0131n\u0131 tamamen atlayabilir.<\/li>\n
                          • CDN Kullan\u0131m\u0131<\/b>: Statik varl\u0131klar\u0131 (resimler, CSS, JS) CDN \u00fczerinden sunmak, ana sunucunuzun y\u00fck\u00fcn\u00fc azalt\u0131r.<\/li>\n
                          • Veritaban\u0131 Temizli\u011fi<\/b>: Revizyonlar\u0131, spam yorumlar\u0131 ve ge\u00e7ici verileri d\u00fczenli olarak temizlemek, veritaban\u0131 boyutunu k\u00fc\u00e7\u00fclt\u00fcr ve sorgu performans\u0131n\u0131 art\u0131r\u0131r.<\/li>\n<\/ul>\n
                            WordPress \u00d6zel Optimizasyonlar<\/h4>\n
                            WordPress'e \u00f6zg\u00fc baz\u0131 optimizasyonlar \u015funlard\u0131r:<\/p>\n
                              \n
                            • wp_options<\/code> Tablosunu Optimize Etme<\/b>: autoload = 'yes'<\/code> olan se\u00e7enek say\u0131s\u0131n\u0131 minimumda tutun. Gereksiz eklentileri devre d\u0131\u015f\u0131 b\u0131rak\u0131n.<\/li>\n
                            • Post Revizyonlar\u0131n\u0131 S\u0131n\u0131rlama<\/b>: wp-config.php<\/code> dosyas\u0131na define('WP_POST_REVISIONS', 3);<\/code> ekleyerek revizyon say\u0131s\u0131n\u0131 s\u0131n\u0131rlay\u0131n.<\/li>\n
                            • Gereksiz Eklentileri ve Temalar\u0131 Kald\u0131rma<\/b>: Kullanmad\u0131\u011f\u0131n\u0131z eklentiler ve temalar veritaban\u0131na gereksiz y\u00fck bindirebilir.<\/li>\n<\/ul>\n
                              Sonu\u00e7<\/h3>\n
                              MySQL EXPLAIN<\/code> plan\u0131n\u0131 okumak, WordPress sitenizin veritaban\u0131 performans\u0131n\u0131 derinlemesine anlamak ve optimize etmek i\u00e7in vazge\u00e7ilmez bir beceridir. type<\/code> ve Extra<\/code> s\u00fctunlar\u0131na \u00f6zellikle dikkat ederek, sorgular\u0131n\u0131zdaki darbo\u011fazlar\u0131 kolayca tespit edebilir ve do\u011fru indeksleme veya sorgu yeniden yazma stratejileriyle sitenizin h\u0131z\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilirsiniz. Unutmay\u0131n, iyi bir performans, iyi optimize edilmi\u015f bir veritaban\u0131yla ba\u015flar ve EXPLAIN<\/code> bu yolculukta en iyi arkada\u015f\u0131n\u0131zd\u0131r.<\/p>\n
                              SSS (S\u0131k Sorulan Sorular)<\/h3>\n
                              1. EXPLAIN \u00e7\u0131kt\u0131s\u0131nda ALL<\/code> g\u00f6rmek her zaman k\u00f6t\u00fc m\u00fcd\u00fcr?<\/h4>\n
                              Evet, genellikle ALL<\/code> (tam tablo taramas\u0131) en k\u00f6t\u00fc performans g\u00f6stergesidir. K\u00fc\u00e7\u00fck tablolar i\u00e7in etkisi minimal olabilir, ancak orta veya b\u00fcy\u00fck boyutlu tablolarda ciddi performans sorunlar\u0131na yol a\u00e7ar. Bu durumda indeksleme eksikli\u011fini kontrol etmelisiniz.<\/p>\n
                              2. Using filesort<\/code> ve Using temporary<\/code> ifadelerini nas\u0131l ortadan kald\u0131rabilirim?<\/h4>\n
                              Using filesort<\/code> genellikle ORDER BY<\/code> veya GROUP BY<\/code> ifadelerinde uygun indeksin olmamas\u0131ndan kaynaklan\u0131r. Bu s\u00fctunlara indeks ekleyerek veya bile\u015fik indeksler kullanarak ortadan kald\u0131rabilirsiniz. Using temporary<\/code> ise karma\u015f\u0131k GROUP BY<\/code>, DISTINCT<\/code> veya ORDER BY<\/code> kombinasyonlar\u0131nda ortaya \u00e7\u0131kar; sorguyu basitle\u015ftirmek veya indeksleme stratejilerini g\u00f6zden ge\u00e7irmek yard\u0131mc\u0131 olabilir.<\/p>\n
                              3. WordPress'te hangi tablolara daha \u00e7ok dikkat etmeliyim?<\/h4>\n
                              Genellikle wp_posts<\/code>, wp_postmeta<\/code>, wp_options<\/code> ve wp_terms<\/code> tablolar\u0131 en yo\u011fun kullan\u0131lanlard\u0131r. \u00d6zellikle wp_postmeta<\/code> tablosundaki meta_key<\/code> ve meta_value<\/code> s\u00fctunlar\u0131 \u00fczerinde s\u0131k\u00e7a sorgu \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131ndan, bu s\u00fctunlara uygun indeksler eklemek kritik \u00f6neme sahiptir.<\/p>\n
                              4. EXPLAIN sadece SELECT<\/code> sorgular\u0131 i\u00e7in mi kullan\u0131l\u0131r?<\/h4>\n
                              Hay\u0131r, MySQL 5.6 ve sonraki s\u00fcr\u00fcmlerde EXPLAIN<\/code> ayn\u0131 zamanda INSERT<\/code>, UPDATE<\/code> ve DELETE<\/code> sorgular\u0131 i\u00e7in de kullan\u0131labilir. Bu, veri de\u011fi\u015ftirme i\u015flemlerinin nas\u0131l etkilendi\u011fini anlaman\u0131za yard\u0131mc\u0131 olur.<\/p>\n
                              5. WordPress eklentileri veya temalar\u0131 taraf\u0131ndan olu\u015fturulan sorgular\u0131 nas\u0131l bulabilirim?<\/h4>\n
                              Yava\u015f sorgu g\u00fcnl\u00fcklerini (slow query log) MySQL sunucunuzda etkinle\u015ftirebilirsiniz. Ayr\u0131ca, Query Monitor gibi WordPress eklentileri, her sayfa y\u00fcklemesinde \u00e7al\u0131\u015fan t\u00fcm sorgular\u0131 ve s\u00fcrelerini g\u00f6stererek sorunlu sorgular\u0131 belirlemenize yard\u0131mc\u0131 olabilir.<\/p>\n","protected":false},"excerpt":{"rendered":"WordPress Siteleri \u0130\u00e7in MySQL EXPLAIN Plan\u0131n\u0131 Anlamak ve Okumak WordPress sitelerinin performans\u0131, b\u00fcy\u00fck \u00f6l\u00e7\u00fcde alt\u0131nda yatan MySQL veritaban\u0131n\u0131n verimli \u00e7al\u0131\u015fmas\u0131na ba\u011fl\u0131d\u0131r.","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[138],"tags":[],"class_list":{"0":"post-40503","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-mysql","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nWordPress Siteleri \u0130\u00e7in MySQL EXPLAIN Plan\u0131n\u0131 Anlamak ve Okumak - 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