سجل "جمع النفايات" من الجهاز المشترك مُنسَق كالتالي: واحد. كل سطر يمثل عملية جمع قمامة واحدة تبدأ من الختم الزمني. اثنين. الحجم قبل وبعد من مناطق الذاكرة المختلفة في JVM تظهر كـ "MemoryArea: BeforeSize->AfterSize(AllocatedSize) " حيث MemoryArea هو واحد من PSYoungGen، ParOldGen، أو Metaspace. ثالثاً. اذا "MemoryArea:" تم حذفها، فهي تمثل حجم الذاكرة الكاملة لجهاز الكمبيوتر المشترك قبل وبعد. أربعة. كل سطر فيه الوقت المطلوب للعملية بالثواني.  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 secs] [Times: user=5.76 sys=0.00, real=4.06 secs] 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 (Failure Allocation) [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 (Failure Allocation) [PSYoungGen: 23508608K->2753575K(24717312K) ] 70942789K->50189628K(82152960K), 4.0754481 secs] [Times: user=5.72 sys=0.00, real=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 secs [Times: user=377.34 sys=2.75, real=31.04 secs] 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 secs [Times: 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 secs [Times: user=380.50 sys=2.90, real=31.30 secs] 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. السجل عنده 47 عمليات للشركة العامة خلال فترة 36 دقيقة من السابعة صباحا الى السابعة و36 صباحا في 30 مارس 2023 بالتوقيت العالمي. اثنين. العمليات الجي سي تبدأ تقريباً بواحد في الدقيقة وتستغرق اقل من خمس ثواني كل واحد، لكن بعد الساعه 7:23 صباحاً، فجأة تستغرق حوالي 30 ثانية كل واحد وتحدث مرتين في الدقيقة. بمعنى اخر، في البداية، عمليات GC تاخذ جزء صغير من وقت JVM، بينما في وقت لاحق، تاخذ تقريباً كل وقتها. ثالثاً. عمليات GC في هذه الفترة الثانية تسبب في انخفاض طفيف جداً في الحجم الكلي للذاكرة ومناطق الذاكرة PSYoungGen وParOldGen وMetaspace. هذا السلوك خاصةً حاد بعد الساعه 7:26:51 صباحاً. أربعة. هذا يشير للكثير من الوقت المستهلك في عمليات الجيش العالمي مع قليل من النتائج. خمسة. الحجم الكلي للذاكرة في البداية ينمو ببطء من 49.5 جيجا بايت الى 52.3 جيجا بايت، لكن في الفترة الثانية يصل الى 78 جيجا بايت. ستة. حجم الذاكرة المخصصة ثابته بـ 82 جيجا بايت خلال الفترة الثانية من عمليات GC، ويشير لحد خارجي. سبعة. انصحك تزيد الحد الأقصى من الذاكرة المخصصة اكثر من حد 82 جيجا بايت، وتضاعفه اذا امكن، وتعيد تشغيل الجي في ام.