MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 03/01/99 through 03/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 14,327 21,356 35,683
Davis 24,486 2,719 27,205
Irvine 9,936 0 9,936
Los Angeles 3,529 9,527 13,056
Riverside 8,964 2,128 11,092
San Diego 2,917 7,028 9,945
San Francisco 4,550 93 4,643
Santa Barbara 7,824 3,564 11,388
Santa Cruz 5,189 4,309 9,498
LBL 0 885 885
LLL 0 697 697
Other - UC 517 2,258 2,775
CSL 0 1,033 1,033
CSU n/a 2,245 2,245
Other-Network UC n/a 38,220 38,220
_______ ______ _____
82,239 96,062 178,301
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 2,883 16,371 107,515
2-4 a.m. 1,785 10,981 66,628
4-6 a.m. 1,755 7,040 45,377
6-8 a.m. 3,702 10,176 75,497
8-10 a.m. 16,968 51,086 381,247
10-12 a.m. 31,629 93,598 701,849
12-2 p.m. 33,012 95,610 711,166
2-4 p.m. 37,888 111,832 831,504
4-6 p.m. 25,152 71,373 539,769
6-8 p.m. 10,711 31,465 240,136
8-10 p.m. 7,745 20,868 170,292
10-12 p.m. 5,072 20,034 136,406
__________ __________ __________ _________________
Total: 178,302 540,434 4,007,386
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 47,049 57,834 104,883
Davis 77,695 7,745 85,440
Irvine 24,248 0 24,248
Los Angeles 5,226 16,382 21,608
Riverside 27,397 4,793 32,190
San Diego 7,867 9,484 17,351
San Francisco 6,624 25 6,649
Santa Barbara 27,337 7,813 35,150
Santa Cruz 13,110 15,728 28,838
LBL 0 1,582 1,582
LLL 0 1,610 1,610
Other - UC 240 4,870 5,110
CSL 0 2,160 2,160
CSU n/a 7,794 7,794
Other-Network UC n/a 165,821 165,821
_______ ______ _____
236,793 303,641 540,434
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 362,024 489,761 851,785
Davis 505,620 43,339 548,959
Irvine 175,353 0 175,353
Los Angeles 42,930 162,341 205,271
Riverside 194,244 56,563 250,807
San Diego 41,402 71,813 113,215
San Francisco 46,858 97 46,955
Santa Barbara 217,446 97,595 315,041
Santa Cruz 75,160 104,517 179,677
LBL 0 15,326 15,326
LLL 0 14,230 14,230
Other - UC 1,562 49,156 50,718
CSL 0 13,546 13,546
CSU n/a 78,809 78,809
Other-Network UC n/a 1,147,694 1,147,694
_______ ______ _____
1,662,599 2,344,787 4,007,386
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 3.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 2.0
2.0 COMMAND mode statistics:
____________________________
Longest session recorded (minutes:seconds) 1144
Average number of searches completed per session 3.0
Retrievals per search - median 2.0
Retrievals per search - average 85.9
Retrievals per search - standard deviation 1319.2
Percent of searches completed with 0 results 31.8%
Percent of searches entered that are long 4.7%
Percent of long searches completed
(includes partial results) 52.2%
Commands entered, by type, excluding errors:
Total Percentage
FIND 524,755 34.9%
DISPLAY (excluding automatic displays) 444,571 29.6%
ACFIND 120 0.0%
BROWSE 3,286 0.2%
SELECT 2,023 0.1%
HELP 24,246 1.6%
EXPLAIN 19,492 1.3%
SET/RESET 30,266 2.0%
SHOW 4,896 0.3%
AT 25,199 1.7%
ADD ON (AND, OR, AND NOT) 15,495 1.0%
LOGON or LOGOFF 289,639 19.3%
COMMENT 1,073 0.1%
SAVE 12,332 0.8%
USE 22,940 1.5%
OTHER 83,257 5.5%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 80,839 14.9% 21,085 26.1% 12 114.9 1411.5
AUTHOR 31,121 5.7% 7,683 24.7% 14 127.2 533.4
CORPORATE AUTH 6,487 1.2% 2,499 38.5% 10 464.3 4653.5
EXACT CA 179 0.0% 96 53.6% 29 473.9 1669.4
TITLE WORD 133,903 24.7% 45,838 34.2% 6 53.8 899.6
EXACT TITLE 67,013 12.4% 24,315 36.3% 2 28.3 229.2
TITLE -> TW 12,044 2.2% 3,127 26.0% 10 62.8 314.6
TITLE -> XT 13,541 2.5% 6,472 47.8% 1 16.3 190.3
SUBJECT 56,319 10.4% 23,997 42.6% 51 482.2 3608.4
EXACT SUBJECT 2,108 0.4% 909 43.1% 75 473.1 1444.4
PERIODICAL 80,253 14.8% 20,578 25.6% 5 133.0 1494.7
EXACT PE 29,593 5.5% 6,375 21.5% 3 29.8 281.2
RPE 49 0.0% 29 59.2% 9 71.4 164.0
XRP 9 0.0% 4 44.4% 4 17.0 24.4
COMMENTS 109 0.0% 40 36.7% 4,065 2222.6 1962.6
LANGUAGE 1,578 0.3% 479 30.4% 35 474.0 2707.4
DATE 5,335 1.0% 1,558 29.2% 4 121.9 1886.5
FORM 4,037 0.7% 1,051 26.0% 17 246.9 2394.1
NUMBER* 598 0.1% 311 52.0% 2 46.0 238.4
MUSIC* 165 0.0% 111 67.3% 6 58.4 112.0
SERIES 10,129 1.9% 3,687 36.4% 6 125.7 2104.3
UNIFORM TITLE 170 0.0% 87 51.2% 18 197.0 600.9
Other indexes 5,887 1.1% 3,013 51.2% 1 24.5 645.5
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 27,291 5.3% 9,173 33.6% 4 83.3 779.7
Single 485,562 94.7% 154,554 31.8% 7 129.9 1647.9
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 330 10.9% 88 26.7% 5 34.9 119.8
CORPORATE AUTH 63 2.1% 32 50.8% 11 45.4 78.6
EXACT CA 7 0.2% 3 42.9% 3 6.5 8.4
SUBJECT 2,469 81.4% 703 28.5% 37 172.5 1937.6
EXACT SUBJECT 134 4.4% 31 23.1% 45 149.4 255.5
UNIFORM TITLE 12 0.4% 7 58.3% 13 19.2 23.4
SERIES 18 0.6% 2 11.1% 14 44.4 64.2
By number of indexes:
Multiple 2 0.1% 1 50.0% 147 147.0 0.0
Single 3,129 99.9% 886 28.3% 26 148.3 1721.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.2%
BRIEF 72.7%
LONG 9.1%
MARC 5.1%
FIELDS 2.6%
TAG 1.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 1.2%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 9.7%
Ten most frequent errors:
1. First word of command is invalid 29.8%
2. NS command - no next screen 24.7%
3. FIND command with invalid index name 12.7%
4. KW search in database w/o KW index 4.6%
5. DISPLAY command contains invalid word 3.1%
6. Search term missing from search command 2.4%
7. Valid command at an inappropriate time 1.9%
8. PS command - no previous screen 1.8%
9. DISPLAY command - no FIND results 1.6%
10. Max. # of ports to a Z39 db are in use 1.6%
11. All others 15.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.0%
2. FIND 15.0%
3. INDEXES 6.8%
4. COMMAND WORDS 6.8%
5. Unrecognized term 5.3%
6. PASSWORDS 3.7%
7. DATABASES 3.3%
8. DISPLAY 3.0%
9. LOCATE (PE DB) 2.1%
10. ADD-ON SEARCH 2.0%
11. All others 29.0%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 18.4%
2. First word of command is invalid 15.5%
3. FIND command with invalid index name 11.7%
4. DISPLAY command - middle of >1 screen 4.3%
5. KW search in database w/o KW index 3.5%
6. NS command - no next screen 3.1%
7. FIND command retrieves >1 book 2.8%
8. DISPLAY command-first of >1 screen 2.5%
9. TW search with zero results 2.5%
10. Help requested from SET DB command 2.3%
11. All others 33.5%
Ten most frequent SHOW requests:
1. HISTORY 26.3%
2. SEARCH 18.6%
3. GLOSSARY 11.1%
4. TIME 6.7%
5. SETTINGS 4.5%
6. NEWS 4.1%
7. MAIL STATUS 3.7%
8. MEDLINE NEWS 2.3%
9. SYSTEM NEWS 1.4%
10. STATISTICS 1.4%
11. All others 19.8%