سجل "جمع النفايات" من الجهاز المشترك مُنسَقَط على النحو التالي: واحد. كل سطر يمثل عملية جمع قمامة واحدة تبدأ من الختم الزمني. ثاني. حجم قبل وبعد مناطق الذاكرة المختلفة في JVM هو "MemoryArea: BeforeSize->AfterSize(AllocatedSize) " حيث MemoryArea هو واحد من PSYoungGen، ParOldGen، أو Metaspace. 3. اذا "MemoryArea:" تم حذفها، فهي تمثل حجم الذاكرة الكاملة لجهاز الكمبيوتر المشترك. اربعة. كل سطر فيه الوقت المطلوب للعملية في ثواني.  لخص السجل التالي ولاحظ اي شذوذات مهمة: 2023-03-30T07:00:19.800+0000: [GC (Allocation Failure) [PSYoungGen: 17197776K->2224032K(21782528K) ] 64496630K->49524856K ((79218176K), 3.2658630 secs] [Times: user=4.53 sys=0.00, real=3.27 secs] 2023-03-30T07:01:06.553+0000: [GC (Allocation Failure) [PSYoungGen: 17471392K->2195300K(22969344K) ] 64772216K->49530782K ((80404992K), 3.3074224 secs] [Times: user=4.63 sys=0.00, real=3.30 secs] 2023-03-30T07:01:56.129+0000: [GC (Allocation Failure) [PSYoungGen: 19045732K->2429792K(22598656K) ] 66381214K->49767742K ((80034304K), 3.5912859 secs] [Times: user=4.94 sys=0.00, real=3.59 secs] 2023-03-30T07:02:46.034+0000: [GC (Allocation Failure) [PSYoungGen: 19280224K->2428421K(23520768K) ] 66618174K->49768148K ((80956416K), 3.6520001 secs] [Times: user=5.07 sys=0.03, real=3.65 secs] 2023-03-30T07:03:39.130+0000: [GC (Allocation Failure) [PSYoungGen: 20488709K->2600800K(23257088K) ] 67828436K->49943004K(80692736K), 3.8378192 secs] [Times: user=5.19 sys=0.00, real=3.84 secs] 2023-03-30T07:04:31.634+0000: [GC (Allocation Failure) [PSYoungGen: 20661088K->2550592K(23885312K) ] 68003292K->49894476K(81320960K), 3.7886199 secs] [Times: user=5.15 sys=0.00, real=3.78 secs] 2023-03-30T07:05:28.784+0000: [GC (Allocation Failure) [PSYoungGen: 21416768K->2709510K(23698432K) ] 68760652K->50055163K(81134080K), 3.9951697 secs] [Times: user=5.54 sys=0.00, real=3.99 secs] 2023-03-30T07:06:24.857+0000: [GC (Allocation Failure) [PSYoungGen: 21575686K->2709696K(24113664K) ] 68921339K->50058933K(81549312K) ، 4.0210395 secs] [Times: user=5.47 sys=0.01, real=4.02 secs] 2023-03-30T07:07:21.991+0000: [GC (Allocation Failure) [PSYoungGen: 22106304K->2835749K(24000512K) ] 69455541K->50186794K(81436160K) ، 4.0703042 ثواني] [تايمز: مستخدم=5.76 sys=0.00, حقيقي=4.06 ثواني] 2023-03-30T07:08:18.668+0000: [GC (Allocation Failure) [PSYoungGen: 22232357K->2785312K(24265216K) ] 69583402K->50204626K(81700864K) ، 4.1296625 secs] [Times: user=5.77 sys=0.00, real=4.13 secs] 2023-03-30T07:09:16.891+0000: [GC (Allocation Failure) [PSYoungGen: 22510624K->2834405K(24177664K) ] 69929938K->50255520K(81613312K) ، 4.2070487 secs] [Times: user=5.89 sys=0.01, real=4.21 secs] 2023-03-30T07:10:15.553+0000: [GC (Allocation Failure) [PSYoungGen: 22559717K->2842896K(24403456K) ] 69980832K->50266688K(81839104K), 4.2489383 secs] [Times: user=5.83 sys=0.02, real=4.24 secs] 2023-03-30T07:11:15.412+0000: [GC (Allocation Failure) [PSYoungGen: 22863632K->2880069K(24334848K) ] 70287424K->50306742K(81770496K), 4.2983311 secs] [Times: user=6.01 sys=0.00, real=4.29 secs] 2023-03-30T07:12:17.330+0000: [GC (Allocation Failure) [PSYoungGen: 22900805K->2670097K(24596992K) ] 70327478K->50099432K(82032640K), 3.9450690 secs] [Times: user=5.44 sys=0.00, real=3.95 secs] 2023-03-30T07:13:15.713+0000: [GC (Allocation Failure) [PSYoungGen: 23009297K->2684375K(24459776K) ] 70438632K->50115773K(81895424K), 3.9758416 secs] [Times: user=5.53 sys=0.00, real=3.97 secs] 2023-03-30T07:14:12.939+0000: [GC (Allocation Failure) [PSYoungGen: 23023575K->2678912K(24829952K) ] 70454973K->50113093K ((82265600K), 3.9702778 secs] [Times: user=5.52 sys=0.00, real=3.97 secs] 2023-03-30T07:15:12.343+0000: [GC (فشل التخصيص) [PSYoungGen: 23508608K->2753575K(24717312K) ] 70942789K->50189628K(82152960K) ، 4.0754481 secs] [تايمز: مستخدم=5.72 sys=0.00, حقيقي=4.08 secs] 2023-03-30T07:16:13.026+0000: [GC (Allocation Failure) [PSYoungGen: 23583271K->2762097K(24974336K) ] 71019324K->50201762K(82409984K), 4.1128461 secs] [Times: user=5.66 sys=0.00, real=4.11 secs] 2023-03-30T07:17:14.129+0000: [GC (Allocation Failure) [PSYoungGen: 23924593K->2797957K(24905728K) ] 71364258K->50239629K(82341376K), 4.1456776 secs] [Times: user=5.74 sys=0.01, real=4.15 secs] 2023-03-30T07:18:14.857+0000: [GC (Allocation Failure) [PSYoungGen: 23960453K->2804721K(25075712K) ] 71402125K->50249103K(82511360K) ، 4.1905285 secs] [Times: user=5.73 sys=0.01, real=4.19 secs] 2023-03-30T07:19:15.979+0000: [GC (Allocation Failure) [PSYoungGen: 24189937K->3641846K(25027072K) ] 71634319K->51171235K(82462720K), 3.6175882 secs] [Times: user=5.94 sys=0.00, real=3.62 secs] 2023-03-30T07:22:24.484+0000: [GC (Allocation Failure) [PSYoungGen: 25027062K->3360979K(24336896K) ] 72556451K->52269877K(81772544K), 0.4407322 secs] [Times: user=5.66 sys=0.00, real=0.44 secs] 2023-03-30T07:22:38.974+0000: [GC (Allocation Failure) [PSYoungGen: 24007379K->4035567K(24681984K) ] 72916277K->57145380K ((82117632K), 0.8531910 secs] [Times: user=10.80 sys=0.23, real=0.85 secs] 2023-03-30T07:22:52.666+0000: [GC (Allocation Failure) [PSYoungGen: 24677029K->24677029K(24681984K) ] 77786841K->82112670K ((82117632K), 7.3509182 secs] [Times: user=22.60 sys=11.27, real=7.35 secs] 2023-03-30T07:23:00.017+0000: [Full GC (Ergonomics) ] [PSYoungGen: 24677029K->0K(24681984K) ] [ParOldGen: 57435641K->57435322K(57435648K) ] 82112670K->57435322K(82117632K) ، [Metaspace: 241941K->241941K(260096K) ]، 26.4487596 secs] [Times: user=313.82 sys=2.44، real=26.45 secs] 2023-03-30T07:24:07.186+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->12427037K(24681984K) ] [ParOldGen: 57435322K->57435609K(57435648K) ] 78081722K->69862646K(82117632K), [Metaspace: 241947K->241947K(260096K) ]، 28.8675082 secs [Times: user=350.97 sys=1.74, real=28.87 secs] 2023-03-30T07:24:36.057+0000: [Full GC (System.gc()) [PSYoungGen: 12730000K->12427055K(24681984K) ] [ParOldGen: 57435609K->57435556K(57435648K) ] 70165609K->69862611K(82117632K), [Metaspace: 241947K->241947K(260096K) ] 31.3736816 secs [Times: user=379.38 sys=2.94, real=31.37 secs] 2023-03-30T07:25:18.096+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->16985330K(24681984K) ] [ParOldGen: 57435556K->57435308K(57435648K) ] 78081956K->74420638K(82117632K), [Metaspace: 241999K->241999K(260096K) ]، 31.4762980 sec] [Times: user=363.38 sys=3.10, real=31.48 secs] 2023-03-30T07:25:54.537+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->19116969K(24681984K) ] [ParOldGen: 57435308K->57435152K(57435648K) ] 78081708K->76552122K(82117632K), [Metaspace: 241999K->241999K(260096K) ]، 31.0418139 sec] [Times: user=377.34 sys=2.75, real=31.04 sec] 2023-03-30T07:26:27.487+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->19955901K(24681984K) ] [ParOldGen: 57435152K->57435290K(57435648K) ] 78081552K->77391191K ((82117632K) ]، [Metaspace: 241999K->241999K ((260096K) ]، 22.9475977 secs] [Times: user=280.80 sys=1.57, real=22.95 secs] 2023-03-30T07:26:51.319+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20340549K(24681984K) ] [ParOldGen: 57435290K->57435523K(57435648K) ] 78081690K->77776072K(82117632K), [Metaspace: 242004K->242004K(260096K) ] 37.2564843 secs [Times: user=458.29 sys=3.35, real=37.26 secs] 2023-03-30T07:27:28.892+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20465997K(24681984K) ] [ParOldGen: 57435523K->57435230K(57435648K) ] 78081923K->77901227K(82117632K), [Metaspace: 242007K->242007K(260096K) ], 31.4213545 secs [Times: user=382.65 sys=2.74, real=31.42 secs] 2023-03-30T07:28:00.350+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20492397K(24681984K) ] [ParOldGen: 57435230K->57435139K(57435648K) ] 78081630K->77927536K(82117632K) ، [Metaspace: 24K2011->201124K(260096K) ]، 17.3069966 ثواني] [تايمز: user=209.34 sys=0.45, real=17.31 secs] 2023-03-30T07:28:17.694+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20639999K->20482496K(24681984K) ] [ParOldGen: 57435139K->57435581K(57435648K) ] 78075138K->77918078K(82117632K), [Metaspace: 242023K->242023K(260096K) ]، 39.0253664 secs [Times: user=478.37 sys=3.87, real=39.02 secs] 2023-03-30T07:28:56.752+0000: [Full GC (Ergonomics) [PSYoungGen: 20629482K->20490559K->24681984K) ] [ParOldGen: 57435581K->57435269K->57435648K) ] 78065064K->77925828K->82117632K) ، [Metaspace: 242023K->242023K->260096K] ، 32.7146380 sec] [Times: user=398.86 sys=2.93, real=32.71 secs] 2023-03-30T07:29:29.592+0000: [Full GC (Ergonomics) [PSYoungGen: 20627596K->20498740K(24681984K) ] [ParOldGen: 57435269K->57435482K(57435648K) ] 78062865K->77934223K(82117632K), [Metaspace: 242029K->242029K(260096K) ]، 39.9805382 secs [Times user=491.39 sys=4.10, real=39.98 secs] 2023-03-30T07:30:09.618+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20529006K(24681984K) ] [ParOldGen: 57435482K->57435402K(57435648K) ] 78081882K->77964408K(82117632K), [Metaspace: 242038K->242038K(260096K) ]، 31.3632706 secs [Times: user=382.46 sys=2.74, real=31.36 secs] 2023-03-30T07:30:41.012+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20535638K(24681984K) ] [ParOldGen: 57435402K->57435345K(57435648K) ] 78081802K->77970983K(82117632K), [Metaspace: 242053K->242053K(260096K) ]، 31.0060106 secs [Times: user=377.25 sys=2.72, real=31.00 secs] 2023-03-30T07:31:12.022+0000: [Full GC (Ergonomics) [PSYoungGen: 20646400K->20535719K(24681984K) ] [ParOldGen: 57435345K->57435297K(57435648K) ] 78081745K->77971016K(82117632K), [Metaspace: 242053K->242053K(260096K) ] 31.1714473 sec] [Times: user=380.42 sys=2.74, real=31.18 sec] 2023-03-30T07:31:43.215+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20536490K(24681984K) ] [ParOldGen: 57435297K->57435275K(57435648K) ] 78081697K->77971766K(82117632K), [Metaspace: 242061K->242061K(260096K) ]، 30.9676462 sec] [Times: user=377.19 sys=2.88, real=30.96 sec] 2023-03-30T07:32:14.216+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20537679K(24681984K) ] [ParOldGen: 57435275K->57435244K(57435648K) ] 78081675K->77972923K(82117632K), [Metaspace: 242081K->242081K(260096K) ] 31.2592798 secs [Times: user=379.77 sys=3.04, real=31.26 secs] 2023-03-30T07:32:45.532+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20518698K(24681984K) ] [ParOldGen: 57435244K->57435465K(57435648K) ] 78081644K->77954164K82(117632K) ، [Metaspace: 242123K->242123K2600(96K) ]، 38.9523351 secs [Times user:=478.26 sys=4.04, real=38.95 secs] 2023-03-30T07:33:45.139+0000: [Full GC (Ergonomics) [PSYoungGen: 20627835K->20519977K(24681984K) ] [ParOldGen: 57435465K->57435334K(57435648K) ] 78063301K->77955311K(82117632K), [Metaspace: 242185K->242185K260096K) ] 31.8680480 secs [Times user: 388.66 sys=2.88, real=31.87 secs] 2023-03-30T07:34:17.045+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20529987K(24681984K) ] [ParOldGen: 57435334K->57435313K(57435648K) ] 78081734K->77965301K82(117632K) ، [Metaspace: 242185K->242185K26(0096K) ]، 30.6528436 secs [Times: user=370.84 sys=3.05, real sec=30.65s] 2023-03-30T07:35:08.312+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20552578K(24681984K) ] [ParOldGen: 57435313K->57435312K(57435648K) ] 78081713K->77987890K(82117632K), [Metaspace: 242202K->242202K(260096K) ]، 31.3030289 sec] [Times: user=380.50 sys=2.90, real=31.30 sec] 2023-03-30T07:35:39.649+0000: [Full GC (Ergonomics) [PSYoungGen: 20646400K->20541558K(24681984K) ] [ParOldGen: 57435312K->57435297K(57435648K) ] 78081712K->77976855K(82117632K), [Metaspace: 242217K->242217K2600(96K) ] 31.4996226 secs [Times: user=384.32 sys=3.00, real sec=31.50s] 2023-03-30T07:36:11.199+0000: [Full GC (Ergonomics) ] [PSYoungGen: 20646400K->20562436K(24681984K) ] [ParOldGen: 57435297K->57435260K(57435648K) ] 78081697K->77997697K ((82117632K) ]، [Metaspace: 242238K->242238K(260096K) ]، 31.1358920 sec] [Times: user=378.46 sys=3.00, real=31.14 secs]
واحد. سجل 47 عمليات GC على فترة 36 دقيقة من الساعة 7:00 صباحاً إلى الساعة 7:36 صباحاً في 30 مارس 2023 بتوقيت العالم. ثاني. العمليات الجينية تبدأ بواحدة في الدقيقة وتستغرق اقل من خمس ثواني كل واحدة، لكن بعد الساعة 7:23 صباحاً، فجأة تأخذ حوالي 30 ثانية كل واحدة وتحدث مرتين في الدقيقة. بعبارة اخرى، في البداية، عمليات GC تأخذ جزء صغير من وقت JVM، بينما في وقت لاحق، تأخذ كل وقتها تقريباً. 3. عمليات GC في هذه الفترة الثانية تؤدي إلى انخفاض طفيف جداً في الحجم الكلي للذاكرة ومناطق الذاكرة PSYoungGen و ParOldGen و Metaspace. هذا السلوك خاصةً حاد بعد الساعة 7:26:51 صباحاً. اربعة. هذا يشير الى الكثير من الوقت الذي قضيته في عمليات المجلس العام مع قليل من النتائج خمسة. حجم الذاكرة الكلي في البداية ينمو ببطء من 49.5 جيجا بايت إلى 52.3 جيجا بايت، لكن في الفترة الثانية يصل إلى حوالي 78 جيجا بايت. ستة. حجم الذاكرة المخصصة ثابت بـ 82 جيجا بايت خلال الفترة الثانية من عمليات GC، ويشير لحد خارجي. سبعه. اقترح زيادة الحد الأقصى للذاكرة المخصصة فوق حدود 82 جيجا بايت، مضاعفة لو ممكن، وإعادة تشغيل JVM.