MELVYL IAC DATABASES TELNET STATISTICS
Time period: 01/01/01 through 01/31/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 494 1,497 1,991
Davis 907 15 922
Irvine 667 0 667
Los Angeles 45 448 493
Riverside 237 123 360
San Diego 129 189 318
San Francisco 307 0 307
Santa Barbara 236 191 427
Santa Cruz 297 193 490
LBL 0 36 36
LLL 0 14 14
Los Alamos n/a 6 6
Other - UC 26 141 167
Stanford 270
Other-Network UC n/a 608 608
_______ ______ _____
3,345 3,461 7,076
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 88 282 3,098
2-4 a.m. 40 140 1,820
4-6 a.m. 41 104 2,729
6-8 a.m. 122 345 2,840
8-10 a.m. 643 1,661 16,572
10-12 a.m. 1,122 2,873 30,564
12-2 p.m. 1,291 3,334 45,662
2-4 p.m. 1,511 4,082 44,319
4-6 p.m. 1,035 3,020 32,675
6-8 p.m. 470 1,302 16,601
8-10 p.m. 395 1,313 16,009
10-12 p.m. 318 1,030 16,435
__________ __________ __________ _________________
Total: 7,076 19,486 229,324
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,334 3,908 5,242
Davis 2,422 29 2,451
Irvine 1,879 0 1,879
Los Angeles 204 1,226 1,430
Riverside 548 388 936
San Diego 402 453 855
San Francisco 993 0 993
Santa Barbara 693 532 1,225
Santa Cruz 790 636 1,426
LBL 0 95 95
LLL 0 32 32
Los Alamos n/a 10 10
Other - UC 48 324 372
Stanford 667
Other-Network UC n/a 1,873 1,873
_______ ______ _____
9,313 9,506 19,486
Number of FIND commands by database
MAGS database 17,280
NEWS database 1,477
COMP database 729
Total number of FIND commands 19,486
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 12,889 44,692 57,581
Davis 21,009 117 21,126
Irvine 29,631 0 29,631
Los Angeles 2,351 15,907 18,258
Riverside 5,045 2,655 7,700
San Diego 2,667 9,339 12,006
San Francisco 12,986 0 12,986
Santa Barbara 6,146 5,915 12,061
Santa Cruz 6,157 6,540 12,697
LBL 0 764 764
LLL 0 2,643 2,643
Los Alamos n/a 103 103
Other - UC 498 8,094 8,592
Stanford 1,028
Other-Network UC n/a 25,831 25,831
_______ ______ _____
99,379 122,600 223,007
Number of Records Displayed by database:
MAGS database 203,466
NEWS database 11,765
COMP database 14,093
Total number of Records Displayed 223,007
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.6%
Percent of NEWS sessions 8.9%
Percent of COMP sessions 4.5%
Percent of searches done in the MAGS database 88.7%
Percent of searches done in the NEWS database 7.6%
Percent of searches done in the COMP database 3.7%
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 2.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:56
Average session length (minutes:seconds) 12:08
Longest session recorded (minutes:seconds) 552:25
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 647.2
Retrievals per search - standard deviation 9775.0
Percent of searches completed with 0 results 29.4%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 57.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 16,164 28.5%
DISPLAY (excluding automatic displays) 21,774 38.4%
HELP 1,538 2.7%
EXPLAIN 1,112 2.0%
SET/RESET 2,323 4.1%
SHOW 257 0.5%
ADD ON (AND, OR, AND NOT) 1,116 2.0%
LOGON or LOGOFF 8,109 14.3%
COMMENT 0 0.0%
SAVE 1,069 1.9%
USE 12 0.0%
OTHER 3,270 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 3,924 23.3% 1,159 29.5% 9 358.9 15539.5
TITLE WORD 3,489 20.7% 1,095 31.4% 10 413.8 3823.1
EXACT TITLE 387 2.3% 192 49.6% 3 130.9 555.0
JOURNAL 852 5.1% 389 45.7% 1,168 8863.0 37974.7
EXACT JOURNAL 346 2.1% 153 44.2% 1,085 6772.9 15062.0
SUBJECT 2,871 17.0% 970 33.8% 23 762.3 18824.5
EXACT SUBJECT 152 0.9% 61 40.1% 64 559.7 1298.2
KEYWORD 3,912 23.2% 802 20.5% 21 852.9 7543.1
SUBFILE 4 0.0% 0 0.0% 112 530.3 915.0
PUBLICATION TYPE 33 0.2% 5 15.2% 7 15.4 33.7
DATE 222 1.3% 60 27.0% 7 227.9 929.3
ADDED 4 0.0% 0 0.0% 28,849 22823.0 15844.4
PERIODICAL 368 2.2% 73 19.8% 5 138.9 676.9
EXACT PE 166 1.0% 23 13.9% 2 19.1 108.4
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 136 0.8% 32 23.5% 224 2331.2 4690.5
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 808 5.0% 282 34.9% 7 2131.3 35770.6
Single 15,229 95.0% 4,444 29.2% 15 903.7 9439.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
SHORT 61.2%
LONG 1.5%
FIELDS 1.1%
PERIODICALS 2.0%
COMMENTS 0.0%
Other 31.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:10
Average session length (minutes:seconds) 11:15
Longest session recorded (minutes:seconds) 335:59
Average number of searches completed per session 2.3
Retrievals per search - median 6.0
Retrievals per search - average 1187.5
Retrievals per search - standard deviation 18373
Percent of searches completed with 0 results 33.2%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 40.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 640 22.4%
DISPLAY (excluding automatic displays) 1,166 40.9%
HELP 74 2.6%
EXPLAIN 85 3.0%
SET/RESET 116 4.1%
SHOW 2 0.1%
ADD ON (AND, OR, AND NOT) 89 3.1%
LOGON or LOGOFF 452 15.8%
COMMENT 0 0.0%
SAVE 50 1.8%
USE 0 0.0%
OTHER 180 6.3%
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 87 13.3% 55 63.2% 3 31.5 77.5
TITLE WORD 109 16.6% 39 35.8% 24 362.7 1063.2
EXACT TITLE 4 0.6% 4 100% 0 0.0 0.0
JOURNAL 66 10.1% 43 65.1% 2,708 4990.0 6005.3
EXACT JOURNAL 10 1.5% 4 40.0% 1,813 4982.0 8625.8
SUBJECT 114 17.4% 34 29.8% 31 406.7 884.8
EXACT SUBJECT 3 0.5% 0 0.0% 370 436.0 188.9
KEYWORD 236 36.0% 37 15.7% 37 3221.3 34787.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.6% 0 0.0% 469 443.5 366.0
DATE 8 1.2% 3 37.5% 36 41.4 29.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 14 2.1% 4 28.6% 102 98.1 77.9
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
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 1 0.2% 0 0.0% 2,933 2933.0 0.0
By number of indexes:
Multiple 25 4.0% 9 36.0% 70 386.8 735.8
Single 606 96.0% 205 33.8% 35 2093.4 24594.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.7%
SHORT 65.8%
LONG 0.9%
FIELDS 1.3%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 25.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 4,580
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 305
displays or when any of these paging options is set.
TEXT included with MAIL commands 940
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:25
Average session length (minutes:seconds) 8:48
Longest session recorded (minutes:seconds) 98:05
Average number of searches completed per session 2.3
Retrievals per search - median 5.0
Retrievals per search - average 1548.1
Retrievals per search - standard deviation 27048
Percent of searches completed with 0 results 32.2%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 60.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,357 32.0%
DISPLAY (excluding automatic displays) 1,073 25.3%
HELP 173 4.1%
EXPLAIN 133 3.1%
SET/RESET 280 6.6%
SHOW 28 0.7%
ADD ON (AND, OR, AND NOT) 120 2.8%
LOGON or LOGOFF 780 18.4%
COMMENT 0 0.0%
SAVE 36 0.9%
USE 1 0.0%
OTHER 254 6.0%
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 118 8.2% 43 36.4% 13 321.1 724.3
TITLE WORD 429 29.9% 101 23.5% 13 668.4 4379.6
EXACT TITLE 12 0.8% 8 66.7% 48 62.5 70.7
JOURNAL 16 1.1% 11 68.8% 417925 335483 351069
EXACT JOURNAL 22 1.5% 8 36.4% 355 2623.9 3281.6
SUBJECT 431 30.0% 175 40.6% 41 786.8 3068.4
EXACT SUBJECT 15 1.0% 5 33.3% 290 1159.5 2925.2
KEYWORD 319 22.2% 88 27.6% 22 451.9 2562.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 41 2.9% 11 26.8% 16 131.8 259.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 19 1.3% 4 21.1% 4 14.7 22.4
EXACT PE 10 0.7% 1 10.0% 4 10.7 14.5
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 3 0.2% 3 100% 0 0.0 0.0
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 96 7.2% 24 25.0% 14 670.3 1883.9
Single 1,240 92.8% 409 33.0% 22 2626.8 35742.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
SHORT 43.3%
LONG 3.6%
FIELDS 2.2%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 43.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.6%
Ten most frequent errors:
1. First word of command is invalid 35.2%
2. NS command - no next screen 27.8%
3. FIND command with invalid index name 12.9%
4. PS command - no previous screen 3.5%
5. DISPLAY command contains invalid word 3.2%
6. Valid command at an inappropriate time 2.0%
7. Search term missing from search command 1.9%
8. MAIL command issued w/o email address 1.0%
9. DISPLAY command - no FIND results 0.9%
10. DISPLAY command-record numbers too large 0.9%
11. All others 10.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 26.2%
2. LOCATE (ARTICLE DBS) 13.1%
3. FIND 10.2%
4. COMMANDS 8.9%
5. INDEXES 6.4%
6. MAGS DATABASE 5.4%
7. Unrecognized term 4.2%
8. MAIL 3.0%
9. ADDON SEARCH 2.7%
10. DISPLAYS (IAC DBS) 2.3%
11. All others 17.6%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.3%
2. First word of command is invalid 18.5%
3. FIND command with invalid index name 10.2%
4. FIND command with zero results 7.2%
5. DISPLAY command-first of >1 screen 4.6%
6. DISPLAY command - middle of >1 screen 4.4%
7. FIND command retrieves >1 book 3.8%
8. NS command - no next screen 3.2%
9. DISPLAY command-complete in one screen 3.1%
10. PS command - no previous screen 1.9%
11. All others 14.8%
Ten most frequent SHOW requests:
1. HISTORY 39.8%
2. SEARCH 34.7%
3. SETTINGS (IAC DBS) 4.0%
4. GLOSSARY 3.6%
5. IAC NEWS 3.3%
6. MAIL SETTINGS 3.3%
7. SYSTEM NEWS 2.9%
8. DISPLAY 1.8%
9. MAIL STATUS 1.1%
10. Invalid term 0.7%
11. All others 4.7%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)