MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/01/00 through 03/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,915 2,575 4,490
Davis 1,899 83 1,982
Irvine 2,257 0 2,257
Los Angeles 196 1,342 1,538
Riverside 1,367 170 1,537
San Diego 287 252 539
San Francisco 352 0 352
Santa Barbara 753 499 1,252
Santa Cruz 1,459 236 1,695
LBL 0 98 98
LLL 0 22 22
Los Alamos n/a 6 6
Other - UC 63 407 470
Stanford 413
Other-Network UC n/a 990 990
_______ ______ _____
10,548 6,680 17,641
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 241 955 11,534
2-4 a.m. 73 330 5,460
4-6 a.m. 65 155 2,149
6-8 a.m. 207 563 8,131
8-10 a.m. 1,300 3,717 39,502
10-12 a.m. 2,716 7,999 80,093
12-2 p.m. 3,251 10,673 105,591
2-4 p.m. 3,649 11,364 127,549
4-6 p.m. 2,760 9,387 107,948
6-8 p.m. 1,539 5,510 55,382
8-10 p.m. 1,166 4,716 55,189
10-12 p.m. 674 2,684 33,144
__________ __________ __________ _________________
Total: 17,641 58,053 631,672
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 6,257 7,381 13,638
Davis 6,088 254 6,342
Irvine 7,505 0 7,505
Los Angeles 587 4,547 5,134
Riverside 4,387 454 4,841
San Diego 938 594 1,532
San Francisco 1,031 0 1,031
Santa Barbara 2,648 1,612 4,260
Santa Cruz 5,196 703 5,899
LBL 0 241 241
LLL 0 72 72
Los Alamos n/a 17 17
Other - UC 132 1,342 1,474
Stanford 1,343
Other-Network UC n/a 4,724 4,724
_______ ______ _____
34,769 21,941 58,053
Number of FIND commands by database
MAGS database 52,253
NEWS database 4,427
COMP database 1,373
Total number of FIND commands 58,053
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 63,762 92,820 156,582
Davis 55,288 1,674 56,962
Irvine 64,274 0 64,274
Los Angeles 8,813 63,064 71,877
Riverside 41,013 4,991 46,004
San Diego 8,974 10,939 19,913
San Francisco 14,002 0 14,002
Santa Barbara 23,022 18,716 41,738
Santa Cruz 45,114 6,443 51,557
LBL 0 2,736 2,736
LLL 0 423 423
Los Alamos n/a 139 139
Other - UC 2,131 20,696 22,827
Stanford 1,981
Other-Network UC n/a 70,753 70,753
_______ ______ _____
326,393 293,394 621,768
Number of Records Displayed by database:
MAGS database 586,396
NEWS database 30,725
COMP database 14,551
Total number of Records Displayed 621,768
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.4%
Percent of NEWS sessions 9.6%
Percent of COMP sessions 3.0%
Percent of searches done in the MAGS database 90.0%
Percent of searches done in the NEWS database 7.6%
Percent of searches done in the COMP database 2.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 3.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 3.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:13
Average session length (minutes:seconds) 12:33
Longest session recorded (minutes:seconds) 882:15
Average number of searches completed per session 3.4
Retrievals per search - median 5.0
Retrievals per search - average 529.4
Retrievals per search - standard deviation 4329.0
Percent of searches completed with 0 results 31.2%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 49.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 49,372 28.4%
DISPLAY (excluding automatic displays) 70,934 40.8%
HELP 5,716 3.3%
EXPLAIN 4,095 2.4%
SET/RESET 4,812 2.8%
SHOW 695 0.4%
ADD ON (AND, OR, AND NOT) 2,881 1.7%
LOGON or LOGOFF 22,092 12.7%
COMMENT 3 0.0%
SAVE 2,809 1.6%
USE 24 0.0%
OTHER 10,253 5.9%
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 AUTHOR 7,784 15.3% 2,306 29.6% 9 70.6 270.4
TITLE WORD 9,817 19.3% 2,938 29.9% 14 584.4 5158.0
EXACT TITLE 1,385 2.7% 734 53.0% 3 95.2 560.4
JOURNAL 2,249 4.4% 1,176 52.3% 981 5276.4 12913.1
EXACT JOURNAL 1,337 2.6% 573 42.9% 932 4435.6 9706.4
SUBJECT 12,044 23.7% 4,908 40.8% 40 352.4 2468.2
EXACT SUBJECT 550 1.1% 254 46.2% 62 657.3 1357.8
KEYWORD 13,570 26.7% 2,677 19.7% 28 840.0 5772.8
SUBFILE 5 0.0% 1 20.0% 258 751.3 1159.4
PUBLICATION TYPE 122 0.2% 38 31.1% 11 121.3 434.3
DATE 443 0.9% 102 23.0% 39 286.3 1589.6
ADDED 21 0.0% 0 0.0% 35,360 33749.0 19301.9
PERIODICAL 884 1.7% 140 15.8% 9 219.9 1658.0
EXACT PE 272 0.5% 39 14.3% 4 51.4 193.6
RPE 1 0.0% 0 0.0% 439 439.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 294 0.6% 83 28.2% 146 2679.6 7495.5
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 1,781 3.6% 599 33.6% 12 447.8 2582.3
Single 47,111 96.4% 14,725 31.3% 22 798.9 5295.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 65.3%
LONG 1.1%
FIELDS 0.7%
PERIODICALS 1.5%
COMMENTS 0.0%
Other 29.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:51
Average session length (minutes:seconds) 11:42
Longest session recorded (minutes:seconds) 293:46
Average number of searches completed per session 2.5
Retrievals per search - median 5.0
Retrievals per search - average 1039.7
Retrievals per search - standard deviation 7816.7
Percent of searches completed with 0 results 34.1%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 52.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,232 24.8%
DISPLAY (excluding automatic displays) 1,894 38.2%
HELP 186 3.7%
EXPLAIN 161 3.2%
SET/RESET 184 3.7%
SHOW 31 0.6%
ADD ON (AND, OR, AND NOT) 141 2.8%
LOGON or LOGOFF 717 14.5%
COMMENT 0 0.0%
SAVE 127 2.6%
USE 0 0.0%
OTHER 288 5.8%
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 AUTHOR 124 9.5% 83 66.9% 3 45.0 156.3
TITLE WORD 245 18.8% 83 33.9% 33 1145.6 5778.2
EXACT TITLE 15 1.2% 6 40.0% 1 91.8 266.0
JOURNAL 61 4.7% 38 62.3% 3,116 7721.8 12294.0
EXACT JOURNAL 17 1.3% 6 35.3% 12,908 48065.6 65874.6
SUBJECT 235 18.0% 94 40.0% 85 1102.6 3418.0
EXACT SUBJECT 11 0.8% 7 63.6% 64 567.3 1044.5
KEYWORD 510 39.1% 117 22.9% 50 874.7 2864.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 0.5% 3 42.9% 48 74.3 88.0
DATE 44 3.4% 12 27.3% 23 44.5 61.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 19 1.5% 6 31.6% 19 76.2 117.4
EXACT PE 4 0.3% 1 25.0% 2 4.0 4.4
RPE 4 0.3% 4 100% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 8 0.6% 1 12.5% 4 3041.7 6837.2
By number of indexes:
Multiple 80 6.6% 33 41.2% 19 507.6 2694.1
Single 1,139 93.4% 394 34.6% 50 1842.0 10469.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.0%
SHORT 62.7%
LONG 1.0%
FIELDS 2.1%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 28.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 13,985
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 632
displays or when any of these paging options is set.
TEXT included with MAIL commands 3,384
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:05
Average session length (minutes:seconds) 9:47
Longest session recorded (minutes:seconds) 386:08
Average number of searches completed per session 2.6
Retrievals per search - median 3.0
Retrievals per search - average 1951.8
Retrievals per search - standard deviation 33153
Percent of searches completed with 0 results 37.6%
Percent of searches entered that are long 2.4%
Percent of long searches completed
(includes partial results) 52.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,165 35.3%
DISPLAY (excluding automatic displays) 2,626 22.3%
HELP 616 5.2%
EXPLAIN 402 3.4%
SET/RESET 620 5.3%
SHOW 80 0.7%
ADD ON (AND, OR, AND NOT) 262 2.2%
LOGON or LOGOFF 2,294 19.5%
COMMENT 0 0.0%
SAVE 73 0.6%
USE 4 0.0%
OTHER 642 5.4%
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 AUTHOR 300 6.9% 145 48.3% 17 322.8 638.0
TITLE WORD 892 20.6% 306 34.3% 10 346.3 2188.3
EXACT TITLE 65 1.5% 42 64.6% 3 21.7 43.4
JOURNAL 39 0.9% 15 38.5% 5,068 256477 369903
EXACT JOURNAL 22 0.5% 12 54.5% 101 8333.1 15635.1
SUBJECT 1,435 33.1% 669 46.6% 31 712.6 3254.6
EXACT SUBJECT 85 2.0% 39 45.9% 31 992.5 2546.7
KEYWORD 1,339 30.9% 334 24.9% 20 1450.1 8385.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.1% 2 33.3% 17 77.3 128.1
DATE 118 2.7% 27 22.9% 9 338.2 1337.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 20 0.5% 4 20.0% 20 55.1 77.0
EXACT PE 3 0.1% 0 0.0% 6 12.7 14.2
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 5 0.1% 3 60.0% 36 35.5 9.2
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 208 5.1% 56 26.9% 9 827.0 4464.9
Single 3,905 94.9% 1,483 38.0% 23 3435.8 44427.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 46.8%
LONG 2.4%
FIELDS 0.9%
PERIODICALS 0.5%
COMMENTS 0.0%
Other 46.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.4%
Ten most frequent errors:
1. First word of command is invalid 36.8%
2. NS command - no next screen 23.9%
3. FIND command with invalid index name 11.8%
4. PS command - no previous screen 5.1%
5. DISPLAY command contains invalid word 3.6%
6. Valid command at an inappropriate time 2.5%
7. Search term missing from search command 2.0%
8. NS of SHOW/EXP command-no next screen 1.5%
9. MAIL command issued w/o email address 1.1%
10. DISPLAY command-record numbers too large 0.9%
11. All others 10.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.4%
2. LOCATE (ARTICLE DBS) 20.6%
3. FIND 8.7%
4. COMMANDS 8.0%
5. INDEXES 6.3%
6. MAGS DATABASE 5.4%
7. Unrecognized term 5.3%
8. DISPLAYS (IAC DBS) 3.0%
9. ADDON SEARCH 2.2%
10. MAIL 1.7%
11. All others 15.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.9%
2. First word of command is invalid 20.0%
3. FIND command with invalid index name 10.2%
4. FIND command with zero results 6.5%
5. DISPLAY command - middle of >1 screen 5.6%
6. DISPLAY command-complete in one screen 5.1%
7. DISPLAY command-first of >1 screen 5.0%
8. FIND command retrieves >1 book 3.1%
9. NS command - no next screen 2.9%
10. PS command - no previous screen 2.1%
11. All others 16.5%
Ten most frequent SHOW requests:
1. SEARCH 38.5%
2. HISTORY 35.1%
3. MAIL STATUS 8.0%
4. GLOSSARY 4.2%
5. IAC NEWS 3.5%
6. SETTINGS (IAC DBS) 3.2%
7. MAIL SETTINGS 2.4%
8. SYSTEM NEWS 2.3%
9. LIBRARY NEWS 0.5%
10. DISPLAY 0.5%
11. All others 1.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)